All teams
| Team Name | Sport | Country | Gender |
|---|---|---|---|
| Fighting | International | mixed | |
| 1. FC Köln | Soccer | Germany | male |
| 1. FC Nürnberg | Soccer | Germany | male |
| 2 de Mayo | Soccer | Paraguay | male |
| A.P.R. | Basketball | International | male |
| Aaron Pico | Fighting | International | mixed |
| Aaron Tau | Fighting | International | mixed |
| Abdul Hussein | Fighting | International | mixed |
| Abdul-Kareem Al-Selwady | Fighting | International | mixed |
| Abdulrakhman Yakhyaev | Fighting | International | mixed |
| Abilene Christian | Football | USA | male |
| Abubakar Vagaev | Fighting | International | mixed |
| Abusupiyan Magomedov | Fighting | International | mixed |
| AC Milan | Soccer | Italy | male |
| AC Milan | Soccer | Italy | female |
| Academia Puerto Cabello | Soccer | Venezuela | male |
| Academico Viseu | Soccer | Portugal | male |
| Accrington Stanley | Soccer | England | male |
| Adam Fugitt | Fighting | International | mixed |
| Adirondack Thunder | Ice Hockey | USA | male |
| ADO Den Haag | Soccer | Netherlands | male |
| Adrian Curiel | Fighting | International | mixed |
| Adrian Luna Martinetti | Fighting | International | mixed |
| Adrian Yanez | Fighting | International | mixed |
| AEK Athens | Soccer | Greece | male |
| AEK Athens | Basketball | Greece | male |
| AEK Larnaca | Soccer | Cyprus | male |
| AFC | Football | USA | male |
| AFC Bournemouth | Soccer | England | male |
| AFC Hornchurch | Soccer | England | male |
| AFC Telford United | Soccer | England | male |
| AFC Toronto | Soccer | Canada | female |
| AFC Wimbledon | Soccer | England | male |
| Agua Caliente Clippers | Basketball | USA | male |
| Aiemann Zahabi | Fighting | International | mixed |
| Ailin Perez | Fighting | International | mixed |
| Air Force | Football | USA | male |
| Ajax | Soccer | Netherlands | male |
| Ajax U19 | Soccer | International | male |
| Akron | Football | USA | male |
| Al Ahli | Soccer | Saudi Arabia | male |
| Al Ahly | Basketball | Egypt | male |
| Al Ahly | Soccer | Egypt | male |
| Al Ain | Soccer | UAE | male |
| Al Hilal Omdurman | Soccer | Sudan | male |
| Al Jazira | Soccer | UAE | male |
| Alabama | Football | USA | male |
| Alabama | Basketball | USA | male |
| Alabama | Baseball | USA | male |
| Alajuelense | Soccer | Costa Rica | male |
| Alanyaspor | Soccer | Turkiye | male |
| Alba Berlin | Basketball | Germany | male |
| Albacete | Soccer | Spain | male |
| Albania | Soccer | International | male |
| Alberto Montes | Fighting | International | mixed |
| Alden Coria | Fighting | International | mixed |
| Aldershot Town | Soccer | England | male |
| Alejandro Tabilo | Tennis | Chile | mixed |
| Aleksandar Rakic | Fighting | International | mixed |
| Alessandro Costa | Fighting | International | mixed |
| Alex de Minaur | Tennis | Australia | mixed |
| Alex Morono | Fighting | USA | mixed |
| Alex Pereira | Fighting | International | mixed |
| Alex Perez | Fighting | International | mixed |
| Alex Volkanovski | Fighting | International | mixed |
| Alexa Grasso | Fighting | International | mixed |
| Alexander Blockx | Tennis | Belgium | mixed |
| Alexander Bublik | Tennis | Kazakhstan | mixed |
| Alexander Hernandez | Fighting | International | mixed |
| Alexander Poppeck | Fighting | International | mixed |
| Alexander Volkov | Fighting | International | mixed |
| Alexander Zverev | Tennis | Germany | mixed |
| Alexandra Eala | Tennis | Philippines | mixed |
| Alexandre Pantoja | Fighting | International | mixed |
| Alexia Thainara | Fighting | International | mixed |
| Alfreton Town | Soccer | England | male |
| Algeria | Soccer | International | male |
| Alhama | Soccer | Spain | female |
| Alianza | Soccer | Panama | male |
| Alianza | Soccer | El Salvador | male |
| Alianza Atlético | Soccer | Peru | male |
| Alianza Lima | Soccer | Peru | male |
| Alibi Idiris | Fighting | International | mixed |
| Alice Ardelean | Fighting | International | mixed |
| Alice Pereira | Fighting | International | mixed |
| Aljamain Sterling | Fighting | International | mixed |
| Allan Nascimento | Fighting | International | mixed |
| Allen Frye | Fighting | International | mixed |
| Almería | Soccer | Spain | male |
| Alonzo Menifield | Fighting | International | mixed |
| Altrincham | Soccer | England | male |
| Alverca | Soccer | Portugal | male |
| Alvin Hines | Fighting | International | mixed |
| Always Ready | Soccer | Bolivia | male |
| Amanda Anisimova | Tennis | USA | mixed |
| Amanda Lemos | Fighting | International | mixed |
| Amanda Nunes | Fighting | International | mixed |
| Amed | Soccer | Turkiye | male |
| América | Soccer | Mexico | male |
| América | Soccer | Mexico | female |
| América de Cali | Soccer | Colombia | male |
| American League All-Stars | Baseball | USA | male |
| Amir Albazi | Fighting | International | mixed |
| Anaheim Ducks | Ice Hockey | USA | male |
| Anderlecht | Soccer | Belgium | male |
| Andorra | Soccer | International | male |
| Andre Fili | Fighting | International | mixed |
| Andre Fili | Fighting | USA | mixed |
| Andre Lima | Fighting | International | mixed |
| Andre Petroski | Fighting | International | mixed |
| Andrea Pellegrino | Tennis | Italy | male |
| Andrey Pulyaev | Fighting | International | mixed |
| Andrey Rublev | Tennis | International | mixed |
| Angel City | Soccer | USA | female |
| Angel Pacheco | Fighting | International | mixed |
| Angela Hill | Fighting | International | mixed |
| Angers SCO | Soccer | France | male |
| Angola | Soccer | International | male |
| Angola | Basketball | International | male |
| Anguilla | Soccer | International | male |
| Anguilla | Soccer | International | female |
| Anna Melisano | Fighting | International | mixed |
| Antalyaspor | Soccer | Turkiye | male |
| Ante Delija | Fighting | International | mixed |
| Anthony Hernandez | Fighting | USA | mixed |
| Anthony Romero | Fighting | International | mixed |
| Anthony Wint | Fighting | International | mixed |
| Antigua and Barbuda | Soccer | International | female |
| Antigua and Barbuda | Soccer | International | male |
| Antigua and Barbuda U20 | Soccer | International | male |
| Antigua GFC | Soccer | Guatemala | male |
| Antonio Trocoli | Fighting | International | mixed |
| Antwerp | Soccer | Belgium | male |
| Ararat-Armenia | Soccer | Armenia | male |
| Arezzo | Soccer | Italy | male |
| Argentina | Soccer | International | male |
| Argentina | Basketball | International | female |
| Argentina | Basketball | International | male |
| Argentina | Soccer | International | female |
| Argentina U20 | Soccer | International | female |
| Argentinos Juniors | Soccer | Argentina | male |
| Ariane Carnelossi | Fighting | International | mixed |
| Aris | Soccer | Greece | male |
| Arizona | Basketball | USA | male |
| Arizona | Basketball | USA | female |
| Arizona | Football | USA | male |
| Arizona Cardinals | Football | USA | male |
| Arizona Diamondbacks | Baseball | USA | male |
| Arizona State | Baseball | USA | male |
| Arizona State | Football | USA | male |
| Arizona State | Basketball | USA | male |
| Arka Gdynia | Soccer | Poland | male |
| Arkansas | Basketball | USA | male |
| Arkansas | Football | USA | male |
| Arman Tsarukyan | Fighting | International | mixed |
| Armenia | Soccer | International | male |
| Arminia Bielefeld | Soccer | Germany | male |
| Army | Football | USA | male |
| Arnold Allen | Fighting | International | mixed |
| Arsenal | Soccer | England | female |
| Arsenal FC | Soccer | England | male |
| Arthur Fery | Tennis | England | mixed |
| Arthur Fils | Tennis | France | mixed |
| Arthur Gea | Tennis | France | mixed |
| Arthur Rinderknech | Tennis | France | mixed |
| Artur Minev | Fighting | USA | mixed |
| Artur Minev | Fighting | International | mixed |
| Aruba | Soccer | International | male |
| Aruba U17 | Soccer | International | male |
| Aruba U20 | Soccer | International | male |
| Aryna Sabalenka | Tennis | Kazakhstan | mixed |
| AS FAR | Soccer | Morocco | female |
| AS Karditsas | Basketball | Greece | male |
| Asaf Chopurov | Fighting | International | mixed |
| Ascoli | Soccer | Italy | male |
| Assu Almabaev | Fighting | International | mixed |
| Aston Villa | Soccer | England | female |
| Aston Villa | Soccer | England | male |
| Aston Villa U18 | Soccer | England | male |
| Aston Villa U19 | Soccer | International | male |
| Atalanta | Soccer | Italy | male |
| Ateba Gautier | Fighting | International | mixed |
| Athletic Club | Soccer | Spain | male |
| Athletic Club | Soccer | Spain | female |
| Athletics | Baseball | USA | male |
| Atlanta Braves | Baseball | USA | male |
| Atlanta Dream | Basketball | USA | female |
| Atlanta Falcons | Football | USA | male |
| Atlanta Gladiators | Ice Hockey | USA | male |
| Atlanta Hawks | Basketball | USA | male |
| Atlanta United | Soccer | USA | male |
| Atlante | Soccer | Mexico | male |
| Atlas | Soccer | Mexico | male |
| Atlético Bucaramanga | Soccer | Colombia | male |
| Atletico Madrid | Soccer | Spain | male |
| Atletico Madrid | Soccer | Spain | female |
| Atlético Madrid U19 | Soccer | International | male |
| Atlético Mineiro | Soccer | Brazil | male |
| Atlético Nacional | Soccer | Colombia | male |
| Atlético Ottawa | Soccer | Canada | male |
| Atlético San Luis | Soccer | Mexico | male |
| Atromitos | Soccer | Greece | male |
| Auburn | Football | USA | male |
| Auburn | Basketball | USA | male |
| Auburn | Basketball | USA | female |
| Auburn | Baseball | USA | male |
| Auckland | Soccer | New Zealand | male |
| Audax Italiano | Soccer | Chile | male |
| Austen Lane | Fighting | International | mixed |
| Austin | Soccer | USA | male |
| Austin Bashi | Fighting | USA | mixed |
| Australia | Baseball | International | male |
| Australia | Soccer | International | male |
| Australia | Basketball | International | female |
| Australia | Basketball | International | male |
| Australia | Soccer | International | female |
| Australia U17 | Basketball | International | male |
| Austria | Soccer | International | male |
| Austria | Ice Hockey | International | male |
| Austria | Basketball | International | male |
| Austria Wien | Soccer | Austria | female |
| Auxerre | Soccer | France | male |
| Avellino | Soccer | Italy | male |
| AVS | Soccer | Portugal | male |
| Axel Sola | Fighting | International | mixed |
| AZ | Soccer | Netherlands | male |
| AZ Alkmaar U19 | Soccer | Netherlands | male |
| Azamat Bekoev | Fighting | International | mixed |
| Azamat Murzakanov | Fighting | International | mixed |
| Azerbaijan | Soccer | International | male |
| BA London Lions | Basketball | United Kingdom | female |
| Bahamas | Basketball | International | male |
| Bahia | Soccer | Brazil | male |
| Bahrain | Soccer | International | male |
| Baie-Comeau Drakkar | Ice Hockey | Canada | male |
| Bakersfield Condors | Ice Hockey | USA | male |
| Ball State | Football | USA | male |
| Baltimore Orioles | Baseball | USA | male |
| Baltimore Ravens | Football | USA | male |
| Bangladesh | Soccer | International | male |
| Barcelona | Soccer | Ecuador | male |
| Barcelona | Basketball | Spain | male |
| Barnet | Soccer | England | male |
| Barnsley | Soccer | England | male |
| Barrie Colts | Ice Hockey | Canada | male |
| Barrow | Soccer | England | male |
| Basel | Soccer | Switzerland | male |
| Basket Zaragoza | Basketball | Spain | male |
| Basquet Girona | Basketball | Spain | male |
| Bath City | Soccer | England | male |
| Bay | Soccer | USA | female |
| Bayer Leverkusen | Soccer | Germany | male |
| Bayer Leverkusen | Soccer | Germany | female |
| Bayern München | Soccer | Germany | male |
| Bayern München | Soccer | Germany | female |
| Bayern München U19 | Soccer | Germany | male |
| Bayeux | Soccer | France | male |
| Baylor | Basketball | USA | male |
| Baylor | Basketball | USA | female |
| Baylor | Football | USA | male |
| Baysangur Susurkaev | Fighting | International | mixed |
| BC Lions | Football | Canada | male |
| Beatriz Mesquita | Fighting | International | mixed |
| Bedford Town | Soccer | England | male |
| Bekzat Almakhan | Fighting | International | mixed |
| Belal Muhammad | Fighting | International | mixed |
| Belarus | Soccer | International | male |
| Belgium | Soccer | International | male |
| Belgium | Basketball | International | female |
| Belgium | Basketball | International | male |
| Belize | Soccer | International | male |
| Belleville Senators | Ice Hockey | Canada | male |
| Belouizdad | Soccer | Algeria | male |
| Ben Johnston | Fighting | International | mixed |
| Ben Shelton | Tennis | USA | mixed |
| Beneil Dariush | Fighting | Iran | mixed |
| Benevento | Soccer | Italy | male |
| Benfica | Soccer | Portugal | male |
| Benfica U19 | Soccer | International | male |
| Benin | Soccer | International | male |
| Benin U20 W | Soccer | International | female |
| Benoit St.Denis | Fighting | International | mixed |
| Bernardo Sopaj | Fighting | International | mixed |
| Beşiktaş | Soccer | Turkiye | male |
| Bilal Hasan | Fighting | International | mixed |
| Bilbao | Basketball | Spain | male |
| Billericay Town | Soccer | England | male |
| Billy Elekana | Fighting | USA | mixed |
| Billy Goff | Fighting | International | mixed |
| Billy Quarantillo | Fighting | International | mixed |
| Birmingham City | Soccer | England | male |
| Birmingham City | Soccer | England | female |
| Blackburn Rovers | Soccer | England | male |
| Blackburn U18 | Soccer | England | male |
| Blackpool | Soccer | England | male |
| Blainville-Boisbriand Armada | Ice Hockey | Canada | male |
| Blooming | Soccer | Bolivia | male |
| Bo Nickal | Fighting | International | mixed |
| Bobby Green | Fighting | International | mixed |
| Boca Juniors | Soccer | Argentina | male |
| Boca Juniors | Basketball | Argentina | male |
| Boca Juniors (Arg) | Basketball | International | male |
| Bochum | Soccer | Germany | female |
| Bodø / Glimt | Soccer | Norway | male |
| Bodø / Glimt U19 | Soccer | Norway | male |
| Bogdan Grad | Fighting | International | mixed |
| Bogdan Guskov | Fighting | International | mixed |
| Boise State | Football | USA | male |
| Bolaji Oki | Fighting | International | mixed |
| Bolívar | Soccer | Bolivia | male |
| Bolivia | Soccer | International | male |
| Bologna | Soccer | Italy | male |
| Bolton Wanderers | Soccer | England | male |
| Boreham Wood | Soccer | England | male |
| Borislav Nikolic | Fighting | International | mixed |
| Borlislav Nikolic | Fighting | Serbia | mixed |
| Borussia Dortmund | Soccer | Germany | male |
| Borussia Dortmund U19 | Soccer | Germany | male |
| Borussia M'gladbach | Soccer | Germany | female |
| Borussia Mönchengladbach | Soccer | Germany | male |
| Bosnia & Herzegovina | Basketball | International | male |
| Bosnia-Herzegovina | Soccer | International | male |
| Boston | Ice Hockey | USA | female |
| Boston Bruins | Ice Hockey | USA | male |
| Boston Celtics | Basketball | USA | male |
| Boston College | Ice Hockey | USA | male |
| Boston College | Football | USA | male |
| Boston College | Basketball | USA | male |
| Boston Legacy FC | Soccer | USA | female |
| Boston Red Sox | Baseball | USA | male |
| Boston River | Soccer | Uruguay | male |
| Boston United | Soccer | England | male |
| Boston University | Basketball | USA | female |
| Boston University | Ice Hockey | USA | male |
| Botafogo | Soccer | Brazil | male |
| Botic van de Zandschulp | Tennis | Netherlands | mixed |
| Botswana | Soccer | International | male |
| Bowling Green | Football | USA | male |
| Brackley Town | Soccer | England | male |
| Brad Tavares | Fighting | International | mixed |
| Bradford City | Soccer | England | male |
| Brady Hiestand | Fighting | International | mixed |
| Braintree Town | Soccer | England | male |
| Brampton Honey Badgers | Basketball | Canada | male |
| Brampton Steelheads | Ice Hockey | Canada | male |
| Brando Pericic | Fighting | International | mixed |
| Brandon Moreno | Fighting | Mexico | mixed |
| Brandon Nakashima | Tennis | USA | mixed |
| Brandon Royval | Fighting | International | mixed |
| Brann | Soccer | Norway | male |
| Brantford Bulldogs | Ice Hockey | Canada | male |
| Brazil | Baseball | International | male |
| Brazil | Soccer | International | male |
| Brazil | Soccer | International | female |
| Brazil | Basketball | International | male |
| Brazil | Basketball | International | female |
| Brazil U20 | Soccer | International | female |
| Brendan Allen | Fighting | International | mixed |
| Brendson Ribeiro | Fighting | International | mixed |
| Brentford | Soccer | England | male |
| Breogan | Basketball | Spain | male |
| Brest | Soccer | France | male |
| Bridgeport Islanders | Ice Hockey | USA | male |
| Brighton & Hove Albion | Soccer | England | female |
| Brighton & Hove Albion | Soccer | England | male |
| Bristol City | Soccer | England | male |
| Bristol Flyers | Basketball | United Kingdom | male |
| Bristol Rovers | Soccer | England | male |
| British Virgin Islands | Soccer | International | male |
| Bromley | Soccer | England | male |
| Brooklyn FC | Soccer | USA | female |
| Brooklyn Nets | Basketball | USA | male |
| Brown | Football | USA | male |
| Bruce Whitehead | Fighting | International | mixed |
| Bruna Brasil | Fighting | International | mixed |
| Brunei | Soccer | International | male |
| Brunno Ferreira | Fighting | International | mixed |
| Bruno Lopes | Fighting | Brazil | mixed |
| Bruno Silva | Fighting | International | mixed |
| Bryan Jimenez | Fighting | International | mixed |
| Bryce Mitchell | Fighting | International | mixed |
| Brynäs IF | Ice Hockey | Sweden | male |
| Bucknell | Basketball | USA | female |
| Buffalo | Football | USA | male |
| Buffalo Bills | Football | USA | male |
| Buffalo Sabres | Ice Hockey | USA | male |
| Bulgaria | Soccer | International | male |
| Burkina Faso | Soccer | International | male |
| Burnley | Soccer | England | male |
| Burton Albion | Soccer | England | male |
| Butler | Basketball | USA | male |
| Butler | Basketball | USA | female |
| Buxton | Soccer | England | male |
| BYU | Basketball | USA | male |
| BYU | Basketball | USA | female |
| BYU | Football | USA | male |
| Cádiz | Soccer | Spain | male |
| Cagliari | Soccer | Italy | male |
| Caio Borralho | Fighting | International | mixed |
| Cal Poly | Football | USA | male |
| Calcio Padova | Soccer | Italy | male |
| Caledonia Gladiators | Basketball | United Kingdom | male |
| Caledonia Gladiators | Basketball | United Kingdom | female |
| Calgary Blizzard | Soccer | Canada | male |
| Calgary Flames | Ice Hockey | USA | male |
| Calgary Stampeders | Football | Canada | male |
| Calgary Wild | Soccer | Canada | female |
| Calgary Wranglers | Ice Hockey | USA | male |
| California | Football | USA | male |
| California | Basketball | USA | female |
| California | Basketball | USA | male |
| Callum Simpson | Fighting | International | mixed |
| Cam Rowston | Fighting | International | mixed |
| Cambodia | Soccer | International | male |
| Cambridge United | Soccer | England | male |
| Cameron Nelson | Fighting | International | mixed |
| Cameron Smotherman | Fighting | USA | mixed |
| Cameroon | Soccer | International | male |
| Cameroon | Basketball | International | male |
| Cameroon | Soccer | International | female |
| Canada | Ice Hockey | International | male |
| Canada | Ice Hockey | International | female |
| Canada | Baseball | USA | male |
| Canada | Tennis | International | mixed |
| Canada | Soccer | International | male |
| Canada | Basketball | International | male |
| Canada | Soccer | International | female |
| Canada | Basketball | International | female |
| Canada U17 | Basketball | International | male |
| Canada U17 | Soccer | International | male |
| Canada U18 | Ice Hockey | International | male |
| Canada U18 | Ice Hockey | International | female |
| Canada U20 | Ice Hockey | International | male |
| Canada U20 | Soccer | International | female |
| Canada U20 | Soccer | International | male |
| Cangrejeros | Baseball | International | male |
| Cape Breton Eagles | Ice Hockey | Canada | male |
| Cape Verde | Soccer | International | male |
| Cape Verde | Soccer | International | female |
| Cape Verde | Basketball | International | male |
| Carabobo | Soccer | Venezuela | male |
| Cardiff | Ice Hockey | United Kingdom | male |
| Cardiff City | Soccer | England | male |
| Carl Zeiss Jena | Soccer | Germany | female |
| Carli Judice | Fighting | International | mixed |
| Carlisle United | Soccer | England | male |
| Carlos Alcaraz | Tennis | Spain | mixed |
| Carlos Leal | Fighting | Brazil | mixed |
| Carlos Prates | Fighting | International | mixed |
| Carlos Ulberg | Fighting | International | mixed |
| Carlston Harris | Fighting | International | mixed |
| Carol Foro | Fighting | International | mixed |
| Carolina Ascent | Soccer | USA | female |
| Carolina Hurricanes | Ice Hockey | USA | male |
| Carolina Panthers | Football | USA | male |
| Carrarese | Soccer | Italy | male |
| Cartaginés | Soccer | Costa Rica | male |
| Casa Pia | Soccer | Portugal | male |
| Casey O'Neill | Fighting | International | mixed |
| Casper Ruud | Tennis | Norway | mixed |
| Castellón | Soccer | Spain | male |
| Catania | Soccer | Italy | male |
| Catanzaro | Soccer | Italy | male |
| Cavalry | Soccer | Canada | male |
| Cayman Islands | Soccer | International | male |
| Ce Liu | Fighting | International | mixed |
| Celje | Soccer | Slovenia | male |
| Celta de Vigo | Soccer | Spain | male |
| Celtic | Soccer | Scotland | male |
| Central African Republic | Soccer | International | male |
| Central Michigan | Football | USA | male |
| Cercle Brugge | Soccer | Belgium | male |
| Cerezo Osaka | Soccer | Japan | male |
| Cerro Porteño | Soccer | Paraguay | male |
| Cesar Almeida | Fighting | International | mixed |
| Cesena | Soccer | Italy | male |
| CF Montreal | Soccer | USA | male |
| Chad Anheliger | Fighting | International | mixed |
| Chalon/Saone | Basketball | France | male |
| Chantelle Cameron | Fighting | International | mixed |
| Charles Johnson | Fighting | International | mixed |
| Charles Jourdain | Fighting | International | mixed |
| Charles Oliveira | Fighting | Brazil | mixed |
| Charles Radtke | Fighting | International | mixed |
| Charlotte FC | Soccer | USA | male |
| Charlotte Hornets | Basketball | USA | male |
| Charlton Athletic | Soccer | England | female |
| Charlton Athletic | Soccer | England | male |
| Chase Hooper | Fighting | International | mixed |
| Chelmsford City | Soccer | England | male |
| Chelsea | Soccer | England | male |
| Chelsea Chandler | Fighting | International | mixed |
| Chelsea U19 | Soccer | International | male |
| Chelsea Women | Soccer | England | female |
| Cherneka Johnson | Fighting | International | mixed |
| Chesham United | Soccer | England | male |
| Cheshire Phoenix | Basketball | United Kingdom | male |
| Chester | Soccer | England | male |
| Chesterfield | Soccer | England | male |
| Chicago Bears | Football | USA | male |
| Chicago Blackhawks | Ice Hockey | USA | male |
| Chicago Bulls | Basketball | USA | male |
| Chicago Cubs | Baseball | USA | male |
| Chicago Fire | Soccer | USA | male |
| Chicago Sky | Basketball | USA | female |
| Chicago Stars | Soccer | USA | female |
| Chicago State | Basketball | USA | male |
| Chicago Steel | Ice Hockey | USA | male |
| Chicago White Sox | Baseball | USA | male |
| Chicago Wolves | Ice Hockey | USA | male |
| Chicoutimi Sagueneens | Ice Hockey | Canada | male |
| Chidi Njokuani | Fighting | International | mixed |
| Chile | Basketball | International | male |
| Chile | Soccer | International | male |
| China | Basketball | International | female |
| China | Basketball | International | male |
| China PR | Soccer | International | male |
| China U20 W | Soccer | International | female |
| Chinese Taipei | Baseball | International | male |
| Chinese Taipei | Basketball | International | male |
| Chippenham Town | Soccer | England | male |
| Cholet | Basketball | France | male |
| Chorley | Soccer | England | male |
| Chris Curtis | Fighting | International | mixed |
| Chris Duncan | Fighting | International | mixed |
| Chris Padilla | Fighting | International | mixed |
| Christian Edwards | Fighting | USA | mixed |
| Christian Edwards | Fighting | International | mixed |
| Christian Leroy Duncan | Fighting | International | mixed |
| Christian Medina | Fighting | International | mixed |
| Christian Rodriguez | Fighting | International | mixed |
| Cienciano | Soccer | Peru | male |
| Cincinnati | Football | USA | male |
| Cincinnati | Basketball | USA | male |
| Cincinnati Bengals | Football | USA | male |
| Cincinnati Reds | Baseball | USA | male |
| Ciryl Gane | Fighting | International | mixed |
| Clayton Carpenter | Fighting | International | mixed |
| Clemson | Football | USA | male |
| Clemson | Baseball | USA | male |
| Clemson | Basketball | USA | male |
| Clemson | Basketball | USA | female |
| Clermont | Soccer | France | male |
| Cleveland Browns | Football | USA | male |
| Cleveland Cavaliers | Basketball | USA | male |
| Cleveland Charge | Basketball | USA | male |
| Cleveland Guardians | Baseball | USA | male |
| Cleveland Monsters | Ice Hockey | USA | male |
| Cliftonville | Soccer | Northern Ireland | female |
| Club Africain (Tun) | Basketball | International | male |
| Club Brugge | Soccer | Belgium | male |
| Club Brugge U19 | Soccer | International | male |
| Club Guaraní | Soccer | Paraguay | male |
| Coastal Carolina | Football | USA | male |
| Coastal Carolina | Baseball | USA | male |
| Cobresal | Soccer | Chile | male |
| Coco Gauff | Tennis | USA | mixed |
| Cody Brundage | Fighting | International | mixed |
| Cody Chovancek | Fighting | International | mixed |
| Cody Durden | Fighting | USA | mixed |
| Cody Garbrandt | Fighting | International | mixed |
| Cody Gibson | Fighting | International | mixed |
| Cody Haddon | Fighting | International | mixed |
| Colby Thicknesse | Fighting | International | mixed |
| Colchester United | Soccer | England | male |
| Colombia | Soccer | International | male |
| Colombia | Baseball | International | male |
| Colombia | Basketball | International | male |
| Colombia | Basketball | International | female |
| Colombia | Soccer | International | female |
| Colombia U20 | Soccer | International | female |
| Colorado | Basketball | USA | male |
| Colorado | Football | USA | male |
| Colorado Avalanche | Ice Hockey | USA | male |
| Colorado Eagles | Ice Hockey | USA | male |
| Colorado Rapids | Soccer | USA | male |
| Colorado Rockies | Baseball | USA | male |
| Columbia | Basketball | USA | female |
| Columbus Blue Jackets | Ice Hockey | USA | male |
| Columbus Clippers | Baseball | USA | male |
| Columbus Crew | Soccer | USA | male |
| Como | Soccer | Italy | male |
| Como | Soccer | Italy | female |
| Comoros | Soccer | International | male |
| Cong Wang | Fighting | International | mixed |
| Congo | Soccer | International | male |
| Congo DR | Soccer | International | female |
| Connecticut Sun | Basketball | USA | female |
| Connecticut United FC | Soccer | USA | male |
| Conor McGregor | Fighting | International | mixed |
| Coquimbo Unido | Soccer | Chile | male |
| Córdoba | Soccer | Spain | male |
| Corinthians | Soccer | Brazil | male |
| Corinthians | Soccer | Brazil | female |
| Çorum FK | Soccer | Turkiye | male |
| Cory Sandhagen | Fighting | International | mixed |
| Costa Rica | Soccer | International | female |
| Costa Rica | Soccer | International | male |
| Costa Rica U20 | Soccer | International | female |
| Costa Rica U20 | Soccer | International | male |
| Côte d'Ivoire | Soccer | International | female |
| Court McGee | Fighting | International | mixed |
| Coventry City | Soccer | England | male |
| Cracovia Kraków | Soccer | Poland | male |
| Crawley Town | Soccer | England | male |
| Creighton | Basketball | USA | male |
| Creighton | Basketball | USA | female |
| Cremonese | Soccer | Italy | male |
| Crewe Alexandra | Soccer | England | male |
| Cristian Perez | Fighting | International | mixed |
| Cristian Quinonez | Fighting | International | mixed |
| Cristobal Lorente | Fighting | International | mixed |
| Croatia | Soccer | International | male |
| Croatia | Basketball | International | male |
| Crusaders | Soccer | Northern Ireland | female |
| Cruz Azul | Soccer | Mexico | male |
| Cruzeiro | Soccer | Brazil | male |
| Crystal Palace | Soccer | England | female |
| Crystal Palace | Soccer | England | male |
| Crystal Palace U18 | Soccer | England | male |
| Cub Swanson | Fighting | International | mixed |
| Cuba | Baseball | International | male |
| Cuba | Basketball | International | male |
| Curaçao | Soccer | International | male |
| Curtis Blaydes | Fighting | International | mixed |
| Curzon Ashton | Soccer | England | male |
| Cusco | Soccer | Peru | male |
| Cyprus | Basketball | International | male |
| Cyprus | Soccer | International | male |
| Czech Republic | Ice Hockey | International | male |
| Czech Republic | Baseball | International | male |
| Czech Republic | Basketball | International | male |
| Czech Republic | Ice Hockey | International | female |
| Czech Republic U18 | Ice Hockey | International | male |
| Czech Republic U18 | Ice Hockey | International | female |
| Czech Republic U20 | Ice Hockey | International | male |
| Czechia | Soccer | International | male |
| Czechia | Basketball | International | female |
| D.C. Defenders | Football | USA | male |
| D.C. United | Soccer | USA | male |
| D.R. Congo | Basketball | International | male |
| Dagenham & Redbridge | Soccer | England | male |
| Dakota Hope | Fighting | USA | mixed |
| Dallas Cowboys | Football | USA | male |
| Dallas Mavericks | Basketball | USA | male |
| Dallas Stars | Ice Hockey | USA | male |
| Dallas Trinity | Soccer | USA | female |
| Dallas Wings | Basketball | USA | female |
| Damian Pinas | Fighting | International | mixed |
| Damian Rzepecki | Fighting | International | mixed |
| Damien Anderson | Fighting | International | mixed |
| Dan Ige | Fighting | USA | mixed |
| Daniel Barez | Fighting | International | mixed |
| Daniel Dubois | Fighting | International | mixed |
| Daniel Hooker | Fighting | International | mixed |
| Daniel Merida Aguilar | Tennis | International | mixed |
| Daniel Rodriguez | Fighting | USA | mixed |
| Daniel Santos | Fighting | International | mixed |
| Daniel Zellhuber | Fighting | International | mixed |
| Daniil Donchenko | Fighting | International | mixed |
| Daniil Medvedev | Tennis | International | mixed |
| Danny Silva | Fighting | International | mixed |
| Dar City (Tan) | Basketball | International | male |
| Daria Zheleznyakova | Fighting | International | mixed |
| Darja Vidmanova | Tennis | Czech Republic | female |
| Darlington | Soccer | England | male |
| Darmstadt 98 | Soccer | Germany | male |
| Darren Elkins | Fighting | USA | mixed |
| Darrius Flowers | Fighting | International | mixed |
| Davey Grant | Fighting | International | mixed |
| David Martinez | Fighting | International | mixed |
| DC Power FC | Soccer | USA | female |
| Defence Force | Soccer | Trinidad and Tobago | male |
| Defensor Sporting | Soccer | Uruguay | male |
| Deiveson Figueiredo | Fighting | Brazil | mixed |
| Delaware Blue Coats | Basketball | USA | male |
| Delphine Benouaich | Fighting | International | mixed |
| Dender | Soccer | Belgium | male |
| Denis Shapovalov | Tennis | Canada | mixed |
| Denise Gomes | Fighting | International | mixed |
| Denmark | Ice Hockey | International | male |
| Denmark | Basketball | International | male |
| Denmark | Soccer | International | male |
| Denmark | Soccer | International | female |
| Denmark U18 | Ice Hockey | International | male |
| Denmark U20 | Ice Hockey | International | male |
| Dennis Buzukja | Fighting | International | mixed |
| Denver | Ice Hockey | USA | male |
| Denver Broncos | Football | USA | male |
| Denver Nuggets | Basketball | USA | male |
| Denver Summit FC | Soccer | USA | female |
| Denzel Freeman | Fighting | International | mixed |
| DePaul | Basketball | USA | male |
| Deportes Tolima | Soccer | Colombia | male |
| Deportivo Alavés | Soccer | Spain | male |
| Deportivo Cuenca | Soccer | Ecuador | male |
| Deportivo de La Coruña | Soccer | Spain | female |
| Deportivo Garcilaso | Soccer | Peru | male |
| Deportivo La Coruña | Soccer | Spain | male |
| Deportivo La Guaira | Soccer | Venezuela | male |
| Deportivo Recoleta | Soccer | Paraguay | male |
| Deportivo Saprissa | Soccer | Costa Rica | male |
| Deportivo Táchira | Soccer | Venezuela | male |
| Derby County | Soccer | England | male |
| Derrick Lewis | Fighting | USA | mixed |
| Derry City | Soccer | Northern Ireland | female |
| Des Moines Buccaneers | Ice Hockey | USA | male |
| Detroit Lions | Football | USA | male |
| Detroit Pistons | Basketball | USA | male |
| Detroit Red Wings | Ice Hockey | USA | male |
| Detroit Tigers | Baseball | USA | male |
| Diablos Rojos del Mexico | Baseball | Mexico | male |
| Diana Schnaider | Tennis | Russia | mixed |
| Diego Ferreira | Fighting | Brazil | mixed |
| Diego Lopes | Fighting | International | mixed |
| Dina Thorslund | Fighting | International | mixed |
| Dinamo Zagreb | Soccer | Croatia | male |
| Dione Barbosa | Fighting | International | mixed |
| Diriangén | Soccer | Nicaragua | male |
| Diyar Nurgozhay | Fighting | International | mixed |
| Djorden Dos Santos | Fighting | International | mixed |
| Dom Mar Fan | Fighting | International | mixed |
| Dominican Republic | Baseball | International | male |
| Dominican Republic | Basketball | International | male |
| Dominican Republic | Soccer | International | male |
| Dominick Reyes | Fighting | USA | mixed |
| Doncaster Rovers | Soccer | England | male |
| Donte Johnson | Fighting | International | mixed |
| Doo-Ho Choi | Fighting | International | mixed |
| Dorking Wanderers | Soccer | England | male |
| Douglas Silva de Andrade | Fighting | International | mixed |
| Dover Athletic | Soccer | England | male |
| DR Congo | Soccer | International | male |
| Drakkar Klose | Fighting | USA | mixed |
| Drew Dober | Fighting | International | mixed |
| Dricus Du Plessis | Fighting | International | mixed |
| Drummondville Voltigeurs | Ice Hockey | Canada | male |
| Dubuque Fighting Saints | Ice Hockey | USA | male |
| Duke | Basketball | USA | male |
| Duke | Basketball | USA | female |
| Duke | Football | USA | male |
| Dunkerque | Soccer | France | male |
| Dusko Todorovic | Fighting | International | mixed |
| Dustin Jacoby | Fighting | International | mixed |
| Dustin Stoltzfus | Fighting | International | mixed |
| Dynamo Dresden | Soccer | Germany | male |
| East Carolina | Football | USA | male |
| East Texas A&M University | Football | USA | male |
| Eastbourne Borough | Soccer | England | male |
| Eastern Illinois | Football | USA | male |
| Eastern Michigan | Football | USA | male |
| Eastern Washington | Football | USA | male |
| Eastleigh | Soccer | England | male |
| Ebbsfleet United | Soccer | England | male |
| Ecuador | Soccer | International | male |
| Ecuador U20 | Soccer | International | female |
| Edgar Chairez | Fighting | International | mixed |
| Edmen Shahbazyan | Fighting | International | mixed |
| Edmonton Elks | Football | Canada | male |
| Edmonton Oilers | Ice Hockey | USA | male |
| Edmonton Stingers | Basketball | International | male |
| Edson Barboza | Fighting | International | mixed |
| Eduarda Moura | Fighting | International | mixed |
| Eduardo Chapolin | Fighting | Brazil | mixed |
| Eduardo Henrique | Fighting | International | mixed |
| Eduardo Nunez | Fighting | International | mixed |
| Egypt | Soccer | International | male |
| Egypt | Basketball | International | male |
| Egypt | Soccer | International | female |
| Eibar | Soccer | Spain | male |
| Eibar | Soccer | Spain | female |
| Eintracht Braunschweig | Soccer | Germany | male |
| Eintracht Frankfurt | Soccer | Germany | male |
| Eintracht Frankfurt | Soccer | Germany | female |
| Eintracht Frankfurt U19 | Soccer | Germany | male |
| Eintracht Trier | Soccer | Germany | male |
| El Salvador | Soccer | International | male |
| El Salvador | Soccer | International | female |
| El Salvador U20 | Soccer | International | male |
| Elche | Soccer | Spain | male |
| Elena Rybakina | Tennis | Kazakhstan | mixed |
| Elijah Smith | Fighting | International | mixed |
| Elina Svitolina | Tennis | Ukraine | mixed |
| Elise Mertens | Tennis | International | mixed |
| Elise Reed | Fighting | International | mixed |
| Elisha Ellison | Fighting | International | mixed |
| Elversberg | Soccer | Germany | male |
| Elves Brenner | Fighting | International | mixed |
| Emanuel Navarrete | Fighting | International | mixed |
| Empoli | Soccer | Italy | male |
| Energie Cottbus | Soccer | Germany | male |
| Enfield Town | Soccer | England | male |
| England | Soccer | International | male |
| England U20 | Soccer | International | female |
| Equatorial Guinea | Soccer | International | male |
| Eric McConico | Fighting | International | mixed |
| Eric Nolan | Fighting | International | mixed |
| Erie Otters | Ice Hockey | Canada | male |
| Erik Silva | Fighting | International | mixed |
| Erin Blanchfield | Fighting | International | mixed |
| Eritrea | Soccer | Eritrea | male |
| Ernesta Kareckaite | Fighting | International | mixed |
| Eryk Anders | Fighting | USA | mixed |
| Erzgebirge Aue | Soccer | Germany | male |
| ES Tunis | Soccer | Tunisia | male |
| Espanyol | Soccer | Spain | male |
| Espanyol | Soccer | Spain | female |
| Esteban Ribovics | Fighting | International | mixed |
| Estonia | Basketball | International | male |
| Estonia | Soccer | International | male |
| Estonia | Soccer | International | female |
| Estoril | Soccer | Portugal | male |
| Estrela Amadora | Soccer | Portugal | male |
| Estudiantes | Soccer | Argentina | male |
| Ethiopia U17 | Soccer | International | male |
| Ethyn Ewing | Fighting | International | mixed |
| Evansville | Baseball | USA | male |
| Everett Silvertips | Ice Hockey | Canada | male |
| Everton | Soccer | England | male |
| Everton | Soccer | England | female |
| Everton U18 | Soccer | England | male |
| Excelsior | Soccer | Netherlands | male |
| Exeter City | Soccer | England | male |
| Eyüpspor | Soccer | Turkiye | male |
| Ezra Elliott | Fighting | International | mixed |
| Fabia Sintes | Fighting | International | mixed |
| Fabio Wardley | Fighting | International | mixed |
| Fafe | Soccer | Portugal | male |
| FAR Rabat | Soccer | Morocco | male |
| Fares Ziam | Fighting | International | mixed |
| Farid Basharat | Fighting | International | mixed |
| Färjestad BK | Ice Hockey | Sweden | male |
| Farman Hasanov | Fighting | International | mixed |
| Farnborough | Soccer | England | male |
| Farnham Town | Soccer | England | male |
| Faroe Islands | Soccer | International | male |
| Faroe Islands U19 | Soccer | International | male |
| FAS | Soccer | El Salvador | male |
| Fatih Karagümrük | Soccer | Turkiye | male |
| FC Andorra | Soccer | Spain | male |
| FC Augsburg | Soccer | Germany | male |
| FC Barcelona | Soccer | Spain | male |
| FC Barcelona Femení | Soccer | Spain | female |
| FC Cincinnati | Soccer | USA | male |
| FC Dallas | Soccer | USA | male |
| FC København | Soccer | Denmark | male |
| FC Köln | Soccer | Germany | female |
| FC Köln U19 | Soccer | Germany | male |
| FC Midtjylland | Soccer | Denmark | male |
| FC Red Bull Salzburg | Soccer | Austria | male |
| FC Twente | Soccer | Netherlands | male |
| FC Utrecht | Soccer | Netherlands | male |
| FC Volendam | Soccer | Netherlands | male |
| FCSB | Soccer | Romania | male |
| Federales de Chiriqui | Baseball | International | male |
| Felipe Bunes | Fighting | International | mixed |
| Felipe Franco | Fighting | International | mixed |
| Felipe Lima | Fighting | International | mixed |
| Felix Auger-Aliassime | Tennis | International | mixed |
| Fenerbahçe | Soccer | Turkiye | male |
| Ferencvaros | Soccer | Hungary | male |
| Feyenoord | Soccer | Netherlands | male |
| Filip Hrgovic | Fighting | International | mixed |
| Finland | Ice Hockey | International | male |
| Finland | Ice Hockey | International | female |
| Finland | Basketball | International | male |
| Finland | Soccer | International | male |
| Finland U18 | Ice Hockey | International | male |
| Finland U18 | Ice Hockey | International | female |
| Finland U20 | Ice Hockey | International | male |
| Fiorentina | Soccer | Italy | male |
| Fiorentina | Soccer | Italy | female |
| Firpo | Soccer | El Salvador | male |
| Flamengo | Soccer | Brazil | male |
| Flamengo | Basketball | Brazil | male |
| Flavio Cobolli | Tennis | International | mixed |
| Fleetwood Town | Soccer | England | male |
| Flint Firebirds | Ice Hockey | Canada | male |
| Florida | Basketball | USA | male |
| Florida | Baseball | USA | male |
| Florida | Football | USA | male |
| Florida A&M | Football | USA | male |
| Florida Everblades | Ice Hockey | USA | male |
| Florida International | Football | USA | male |
| Florida Panthers | Ice Hockey | USA | male |
| Florida State | Football | USA | male |
| Florida State | Basketball | USA | male |
| Florida State | Baseball | USA | male |
| Florida State | Basketball | USA | female |
| Fluminense | Soccer | Brazil | male |
| Forca Lleida | Basketball | Spain | male |
| Forest Green Rovers | Soccer | England | male |
| Forge FC | Soccer | Canada | male |
| Fort Lauderdale United | Soccer | USA | female |
| Fortuna Düsseldorf | Soccer | Germany | male |
| Fortuna Sittard | Soccer | Netherlands | male |
| Franca | Basketball | Brazil | male |
| France | Tennis | International | mixed |
| France | Soccer | International | male |
| France | Basketball | International | female |
| France | Basketball | International | male |
| France | Ice Hockey | International | male |
| France U17 | Basketball | International | male |
| France U20 | Soccer | International | female |
| Frances Tiafoe | Tennis | USA | mixed |
| Francesco Nuzzi | Fighting | International | mixed |
| Francis Marshall | Fighting | International | mixed |
| Francisco Prado | Fighting | International | mixed |
| Freiburg | Soccer | Germany | male |
| Freiburg | Soccer | Germany | female |
| Fresno State | Football | USA | male |
| Frölunda HC | Ice Hockey | Sweden | male |
| Frosinone | Soccer | Italy | male |
| FSV Mainz 05 | Soccer | Germany | male |
| Fulham | Soccer | England | male |
| FUS Rabat | Basketball | International | male |
| Fylde | Soccer | England | male |
| Gable Steveson | Fighting | International | mixed |
| Gabon | Soccer | International | male |
| Gabriel Bonfim | Fighting | International | mixed |
| Gabriella Fernandes | Fighting | International | mixed |
| Galatasaray | Soccer | Turkiye | male |
| Galatasaray | Basketball | Turkiye | male |
| Gambia | Soccer | International | male |
| Gaston Bolanos | Fighting | International | mixed |
| Gateshead | Soccer | England | male |
| Gatineau Olympiques | Ice Hockey | Canada | male |
| Gauge Young | Fighting | International | mixed |
| Gauge Young | Fighting | USA | mixed |
| Gaziantep FK | Soccer | Turkiye | male |
| Gençlerbirliği | Soccer | Turkiye | male |
| Genk | Soccer | Belgium | male |
| Genoa | Soccer | Italy | male |
| Genoa | Soccer | Italy | female |
| Gent | Soccer | Belgium | male |
| Geoff Neal | Fighting | International | mixed |
| George Liddard | Fighting | United Kingdom | mixed |
| Georgetown | Basketball | USA | male |
| Georgia | Basketball | International | male |
| Georgia | Soccer | International | male |
| Georgia Tech | Basketball | USA | female |
| Georgia Tech | Football | USA | male |
| Georgia Tech | Baseball | USA | male |
| Georgia Tech | Basketball | USA | male |
| Georgia U21 | Soccer | International | male |
| Gerald Meerschaert | Fighting | International | mixed |
| Germany | Soccer | International | male |
| Germany | Basketball | International | female |
| Germany | Ice Hockey | International | male |
| Germany | Basketball | International | male |
| Germany | Soccer | International | female |
| Germany | Ice Hockey | International | female |
| Germany U18 | Ice Hockey | International | male |
| Germany U19 | Soccer | International | female |
| Germany U20 | Ice Hockey | International | male |
| Germany U21 | Soccer | International | male |
| Getafe | Soccer | Spain | male |
| Ghana | Soccer | International | male |
| Ghana U17 | Soccer | International | male |
| Ghana U20 | Soccer | International | female |
| Gianni Vazquez | Fighting | International | mixed |
| Gibraltar | Soccer | International | male |
| Giga Chikadze | Fighting | International | mixed |
| Gigi Canuto | Fighting | Brazil | mixed |
| Gilbert Burns | Fighting | Brazil | mixed |
| Gilbert Burns | Fighting | International | mixed |
| Gilbert Urbina | Fighting | International | mixed |
| Gillian Robertson | Fighting | Estonia | mixed |
| Girona | Soccer | Spain | male |
| GKS Katowice | Soccer | Poland | male |
| Glentoran | Soccer | Northern Ireland | female |
| Go Ahead Eagles | Soccer | Netherlands | male |
| Gokhan Saricam | Fighting | International | mixed |
| Golden State Valkyries | Basketball | USA | female |
| Golden State Warriors | Basketball | USA | male |
| Górnik Zabrze | Soccer | Poland | male |
| Gotham FC | Soccer | USA | female |
| Göztepe | Soccer | Turkiye | male |
| Gran Canaria | Basketball | Spain | male |
| Granada | Soccer | Spain | female |
| Grand Canyon | Basketball | USA | male |
| Grand Rapids Gold | Basketball | USA | male |
| Grand Rapids Griffins | Ice Hockey | USA | male |
| Grant Dawson | Fighting | USA | mixed |
| Great Britain | Ice Hockey | International | male |
| Great Britain | Baseball | International | male |
| Great Britain | Basketball | International | male |
| Greece | Basketball | International | male |
| Greece | Soccer | International | male |
| Green Bay Gamblers | Ice Hockey | USA | male |
| Green Bay Packers | Football | USA | male |
| Greensboro Gargoyles | Ice Hockey | USA | male |
| Greensboro Swarm | Basketball | USA | male |
| Greenville Swamp Rabbits | Ice Hockey | USA | male |
| Gregory Rodrigues | Fighting | International | mixed |
| Grêmio | Soccer | Brazil | male |
| Grenada | Soccer | International | male |
| Greuther Fürth | Soccer | Germany | male |
| Grigor Dimitrov | Tennis | Bulgaria | mixed |
| Grimsby Town | Soccer | England | male |
| Groningen | Soccer | Netherlands | male |
| Guabirá | Soccer | Bolivia | male |
| Guadalajara | Soccer | Mexico | male |
| Guam | Basketball | International | male |
| Guatemala | Soccer | International | male |
| Guatemala U20 | Soccer | International | male |
| Guilherme Pat | Fighting | International | mixed |
| Guinea | Soccer | International | male |
| Guinea | Basketball | International | male |
| Guinea-Bissau | Soccer | International | male |
| Guingamp | Soccer | France | male |
| Hailey Cowan | Fighting | International | mixed |
| Haiti | Soccer | International | male |
| Haiti | Soccer | International | female |
| Haiti U20 | Soccer | International | male |
| Halifax Mooseheads | Ice Hockey | Canada | male |
| Halifax Tides | Soccer | Canada | female |
| Halifax Town | Soccer | England | male |
| Hallescher FC | Soccer | Germany | male |
| Hamburger SV | Soccer | Germany | male |
| Hamburger SV | Soccer | Germany | female |
| Hamilton Tiger-Cats | Football | Canada | male |
| Hampton | Football | USA | male |
| Hampton & Richmond | Soccer | England | male |
| Hannover 96 | Soccer | Germany | male |
| Hansa Rostock | Soccer | Germany | male |
| Hapoel Be'er Sheva | Soccer | Israel | male |
| Hapoel Holon | Basketball | Israel | male |
| Harrogate Town | Soccer | England | male |
| Harry Hardwick | Fighting | International | mixed |
| Hartlepool United | Soccer | England | male |
| Harvard | Football | USA | male |
| Hawai'i | Football | USA | male |
| HB Køge | Soccer | Denmark | female |
| HEBC Hamburg | Soccer | Germany | male |
| Hecher Sosa | Fighting | International | mixed |
| Hector Santiago | Fighting | International | mixed |
| Hednesford Town | Soccer | England | male |
| Heerenveen | Soccer | Netherlands | male |
| Heidelberg | Basketball | Germany | male |
| Heidenheim | Soccer | Germany | male |
| Heili Alateng | Fighting | International | mixed |
| Hellas Verona | Soccer | Italy | male |
| Hemel Hempstead Town | Soccer | England | male |
| Henderson Silver Knights | Ice Hockey | USA | male |
| Henry Cejudo | Fighting | USA | mixed |
| Heracles | Soccer | Netherlands | male |
| Herediano | Soccer | Costa Rica | male |
| Hereford | Soccer | England | male |
| Hershey Bears | Ice Hockey | USA | male |
| Hertha BSC | Soccer | Germany | male |
| HFX Wanderers | Soccer | Canada | male |
| HJK U19 | Soccer | International | male |
| Hoffenheim | Soccer | Germany | female |
| Holly Holm | Fighting | USA | mixed |
| Holstein Kiel | Soccer | Germany | male |
| Honduras | Soccer | International | male |
| Honduras U20 | Soccer | International | male |
| Hong Kong | Soccer | Hong Kong | male |
| Horsham | Soccer | England | male |
| Houston | Football | USA | male |
| Houston | Basketball | USA | male |
| Houston | Basketball | USA | female |
| Houston Astros | Baseball | USA | male |
| Houston Dash | Soccer | USA | female |
| Houston Dynamo | Soccer | USA | male |
| Houston Rockets | Basketball | USA | male |
| Houston Texans | Football | USA | male |
| Howard | Football | USA | male |
| Huachipato | Soccer | Chile | male |
| Hull City | Soccer | England | male |
| Hungary | Ice Hockey | International | male |
| Hungary | Basketball | International | female |
| Hungary | Basketball | International | male |
| Hungary | Soccer | International | male |
| Hungary U18 | Ice Hockey | International | female |
| Hyder Amil | Fighting | International | mixed |
| Ian Garry | Fighting | International | mixed |
| Iceland | Basketball | International | male |
| Iceland | Soccer | International | male |
| Idaho | Football | USA | male |
| Idaho Steelheads | Ice Hockey | USA | male |
| Iga Swiatek | Tennis | Poland | mixed |
| Ignacio Bahamondes | Fighting | International | mixed |
| Ikram Aliskerov | Fighting | International | mixed |
| Ilia Topuria | Fighting | International | mixed |
| Ilimbek Akylbek Uule | Fighting | International | mixed |
| Illinois | Basketball | USA | male |
| Illinois | Basketball | USA | female |
| Illinois | Football | USA | male |
| Illinois State | Football | USA | male |
| Illinois State | Basketball | USA | male |
| Imanol Rodriguez | Fighting | International | mixed |
| Independiente del Valle | Soccer | Ecuador | male |
| Independiente Medellín | Soccer | Colombia | male |
| Independiente Petrolero | Soccer | Bolivia | male |
| Independiente Rivadavia | Soccer | Argentina | male |
| India | Basketball | International | male |
| India | Soccer | International | female |
| Indiana | Football | USA | male |
| Indiana | Basketball | USA | female |
| Indiana | Basketball | USA | male |
| Indiana Fever | Basketball | USA | female |
| Indiana Pacers | Basketball | USA | male |
| Indiana State | Baseball | USA | male |
| Indiana State | Football | USA | male |
| Indianapolis Colts | Football | USA | male |
| Indonesia | Soccer | International | male |
| Indonesia | Soccer | International | female |
| Indy Fuel | Ice Hockey | USA | male |
| Inter | Soccer | Italy | male |
| Inter Miami | Soccer | USA | male |
| Inter Milan | Soccer | Italy | female |
| Inter Toronto FC | Soccer | Canada | male |
| Inter U19 | Soccer | International | male |
| Ion Cutelaba | Fighting | International | mixed |
| Iowa | Basketball | USA | female |
| Iowa | Basketball | USA | male |
| Iowa | Football | USA | male |
| Iowa Cubs | Baseball | USA | male |
| Iowa Heartlanders | Ice Hockey | USA | male |
| Iowa State | Basketball | USA | male |
| Iowa State | Basketball | USA | female |
| Iowa State | Football | USA | male |
| Iowa Wild | Ice Hockey | USA | male |
| Iowa Wolves | Basketball | USA | male |
| Ipswich Town | Soccer | England | male |
| Iran | Soccer | International | male |
| Iran | Basketball | International | male |
| Iraq | Soccer | International | male |
| Iraq | Basketball | International | male |
| Islam Dulatov | Fighting | International | mixed |
| Islam Makhachev | Fighting | International | mixed |
| Ismael Bonfim | Fighting | International | mixed |
| Ismail Naurdiev | Fighting | Austria | mixed |
| Israel | Baseball | International | male |
| Israel | Basketball | International | male |
| Israel | Soccer | International | male |
| Israel Adesanya | Fighting | International | mixed |
| Italy | Baseball | International | male |
| Italy | Ice Hockey | International | male |
| Italy | Basketball | International | female |
| Italy | Soccer | International | male |
| Italy | Basketball | International | male |
| Italy | Ice Hockey | International | female |
| Italy U20 W | Soccer | International | female |
| Iva Jovic | Tennis | USA | mixed |
| Ivan Erslan | Fighting | International | mixed |
| Ivory Coast | Soccer | International | male |
| Ivory Coast | Basketball | International | male |
| Ivory Coast | Soccer | International | female |
| Iwo Baraniewski | Fighting | International | mixed |
| J. J. Aldrich | Fighting | International | mixed |
| Jack Della Maddalena | Fighting | International | mixed |
| Jack Jenkins | Fighting | International | mixed |
| Jackson McVey | Fighting | International | mixed |
| Jacksonville Jaguars | Football | USA | male |
| Jacob Malkoun | Fighting | International | mixed |
| Jacobe Smith | Fighting | International | mixed |
| Jacqueline Cavalcanti | Fighting | International | mixed |
| Jafel Filho | Fighting | International | mixed |
| Jagiellonia Białystok | Soccer | Poland | male |
| Jai Herbert | Fighting | International | mixed |
| Jailton Almeida | Fighting | International | mixed |
| Jake Matthews | Fighting | Australia | mixed |
| Jake Matthews | Fighting | International | mixed |
| Jakub Mensik | Tennis | Czech Republic | mixed |
| Jakub Wiklacz | Fighting | International | mixed |
| Jalin Turner | Fighting | International | mixed |
| Jalisco | Baseball | Mexico | male |
| Jamaica | Basketball | International | male |
| Jamaica | Soccer | International | female |
| Jamaica | Soccer | International | male |
| Jamaica U17 | Soccer | International | male |
| Jamaica U20 | Soccer | International | male |
| Jamall Emmers | Fighting | International | mixed |
| Jamey-Lyn Horth | Fighting | International | mixed |
| Jamie Mullarkey | Fighting | International | mixed |
| Jamie Siraj | Fighting | International | mixed |
| Jan Blachowicz | Fighting | International | mixed |
| Jan-Lennard Struff | Tennis | Germany | mixed |
| Jannik Sinner | Tennis | Italy | mixed |
| Japan | Baseball | International | male |
| Japan | Ice Hockey | International | female |
| Japan | Soccer | International | male |
| Japan | Basketball | International | female |
| Japan | Basketball | International | male |
| Japan U20 | Soccer | International | female |
| Jaqueline Amorim | Fighting | International | mixed |
| Jared Cannonier | Fighting | International | mixed |
| Jared Gordon | Fighting | International | mixed |
| Jasmine Jasudavicius | Fighting | International | mixed |
| Jasmine Paolini | Tennis | International | mixed |
| Javad Mahjoub | Fighting | International | mixed |
| Javid Basharat | Fighting | International | mixed |
| Javier Reyes | Fighting | International | mixed |
| Javon Walton | Fighting | International | mixed |
| JCA Kings (Ivo) | Basketball | International | male |
| Jean Matsumoto | Fighting | International | mixed |
| Jean Silva | Fighting | International | mixed |
| Jean-Paul Lebosnoyani | Fighting | International | mixed |
| Jefferson Nascimento | Fighting | Brazil | mixed |
| Jefferson Nascimento | Fighting | International | mixed |
| Jeisla Chaves | Fighting | International | mixed |
| Jeong-Yeong Lee | Fighting | International | mixed |
| Jeremiah Wells | Fighting | International | mixed |
| Jeremy Stephens | Fighting | International | mixed |
| Jessica Pegula | Tennis | USA | mixed |
| Jessie Rosas | Fighting | International | mixed |
| Jesus Santos Aguilar | Fighting | International | mixed |
| Jim Crute | Fighting | International | mixed |
| Jim Miller | Fighting | USA | mixed |
| Jingnan Xiong | Fighting | International | mixed |
| Jiri Lehecka | Tennis | International | mixed |
| Jiri Prochazka | Fighting | International | mixed |
| JJ Aldrich | Fighting | USA | mixed |
| Joanderson Brito | Fighting | International | mixed |
| Joao Fonseca | Tennis | International | mixed |
| Joaquin Buckley | Fighting | International | mixed |
| Joburg Giants (Rsa) | Basketball | International | male |
| Joel Alvarez | Fighting | International | mixed |
| John Castaneda | Fighting | International | mixed |
| John Garza | Fighting | USA | mixed |
| John Yannis | Fighting | International | mixed |
| Johnny Walker | Fighting | International | mixed |
| Jonas Erastus | Fighting | Namibia | mixed |
| Jonathan Micallef | Fighting | International | mixed |
| Joo-Sang Yoo | Fighting | International | mixed |
| Jordan | Soccer | International | male |
| Jordan | Basketball | International | male |
| Jordan Leavitt | Fighting | International | mixed |
| Jose Delgado | Fighting | International | mixed |
| Jose Henrique | Fighting | International | mixed |
| Jose Luiz | Fighting | International | mixed |
| Jose Mauro Delano | Fighting | International | mixed |
| Jose Medina | Fighting | International | mixed |
| Jose Ochoa | Fighting | International | mixed |
| Joselyne Edwards | Fighting | International | mixed |
| Joseph Kropschot | Fighting | International | mixed |
| Joseph Morales | Fighting | International | mixed |
| Joseph Pyfer | Fighting | International | mixed |
| Josh Emmett | Fighting | International | mixed |
| Josh Hokit | Fighting | International | mixed |
| Joshua Pagan | Fighting | International | mixed |
| Joshua Van | Fighting | International | mixed |
| Josiah Harrell | Fighting | International | mixed |
| Jovan Leka | Fighting | International | mixed |
| Joventut Badalona | Basketball | Spain | male |
| Juan Diaz | Fighting | International | mixed |
| Juárez | Soccer | Mexico | male |
| Julia Polastri | Fighting | International | mixed |
| Julian Erosa | Fighting | International | mixed |
| Juliana Miller | Fighting | International | mixed |
| Julien Leblanc | Fighting | International | mixed |
| Julius Walker | Fighting | International | mixed |
| Junior | Soccer | Colombia | male |
| Junior Tafa | Fighting | International | mixed |
| Justin Gaethje | Fighting | International | mixed |
| Juve Stabia | Soccer | Italy | male |
| Juventud | Soccer | Uruguay | male |
| Juventus | Soccer | Italy | male |
| Juventus | Soccer | Italy | female |
| Kaan Ofli | Fighting | International | mixed |
| Kai Asakura | Fighting | International | mixed |
| Kai Kamaka | Fighting | USA | mixed |
| Kai Kamaka III | Fighting | International | mixed |
| Kairat | Soccer | Kazakhstan | male |
| Kaiserslautern | Soccer | Germany | male |
| Kalamata | Soccer | Greece | male |
| Kalamazoo Wings | Ice Hockey | USA | male |
| Kalinn Williams | Fighting | International | mixed |
| Kamaru Usman | Fighting | International | mixed |
| Kangjie Zhu | Fighting | International | mixed |
| Kansas | Basketball | USA | male |
| Kansas | Football | USA | male |
| Kansas | Basketball | USA | female |
| Kansas City | Ice Hockey | USA | male |
| Kansas City Chiefs | Football | USA | male |
| Kansas City Current | Soccer | USA | female |
| Kansas City Royals | Baseball | USA | male |
| Kansas State | Football | USA | male |
| Kansas State | Basketball | USA | male |
| Kansas State | Basketball | USA | female |
| Karen Khachanov | Tennis | Russia | mixed |
| Karine Silva | Fighting | International | mixed |
| Karlsruher SC | Soccer | Germany | male |
| Karol Rosa | Fighting | International | mixed |
| Karolina Muchova | Tennis | Czech Republic | mixed |
| Karolina Pliskova | Tennis | Czech Republic | mixed |
| Kasımpaşa | Soccer | Turkiye | male |
| Katlyn Cerminara | Fighting | International | mixed |
| Kaue Fernandes | Fighting | International | mixed |
| Kayla Harrison | Fighting | International | mixed |
| Kayserispor | Soccer | Turkiye | male |
| Kazakhstan | Tennis | International | mixed |
| Kazakhstan | Soccer | International | male |
| Keiichiro Nakamura | Fighting | International | mixed |
| Kelowna Rockets | Ice Hockey | Canada | male |
| Kelvin Gastelum | Fighting | International | mixed |
| Kennedy Nzechukwu | Fighting | International | mixed |
| Kennesaw State | Baseball | USA | male |
| Kent State | Football | USA | male |
| Kentucky | Basketball | USA | male |
| Kentucky | Football | USA | male |
| Kentucky | Basketball | USA | female |
| Kentucky | Baseball | USA | male |
| Kenya | Soccer | International | male |
| Kenya | Soccer | International | female |
| Ketlen Souza | Fighting | International | mixed |
| Ketlen Vieira | Fighting | International | mixed |
| Kevin Borjas | Fighting | International | mixed |
| Kevin Christian | Fighting | International | mixed |
| Kevin Holland | Fighting | USA | mixed |
| Kevin Vallejos | Fighting | International | mixed |
| Khamzat Chimaev | Fighting | International | mixed |
| Khaos Williams | Fighting | USA | mixed |
| Kidderminster Harriers | Soccer | England | male |
| Kifisia | Soccer | Greece | male |
| King's Lynn Town | Soccer | England | male |
| Kingston Frontenacs | Ice Hockey | Canada | male |
| Kitchener Rangers | Ice Hockey | Canada | male |
| Klaudia Sygula | Fighting | International | mixed |
| Kocaelispor | Soccer | Turkiye | male |
| Kody Steele | Fighting | International | mixed |
| Konyaspor | Soccer | Turkiye | male |
| Korea DPR U20 | Soccer | International | female |
| Korea Republic | Soccer | International | male |
| Korea Republic | Basketball | International | female |
| Korea Republic | Soccer | International | female |
| Korea Republic U20 | Soccer | International | female |
| Korona Kielce | Soccer | Poland | male |
| Kortrijk | Soccer | Belgium | male |
| Kosovo | Soccer | International | male |
| Kris Moutinho | Fighting | International | mixed |
| Kristina Liutova | Tennis | Russia | female |
| KuPS | Soccer | Finland | male |
| Kurtis Campbell | Fighting | International | mixed |
| Kyle Daukaus | Fighting | International | mixed |
| Kyle Nelson | Fighting | International | mixed |
| Kyle Prepolec | Fighting | International | mixed |
| Kyler Phillips | Fighting | USA | mixed |
| Kyoji Horiguchi | Fighting | International | mixed |
| Labinot Xhoxhaj | Fighting | International | mixed |
| Lance Gibson Jr. | Fighting | International | mixed |
| Landon Vannata | Fighting | International | mixed |
| Lanús | Soccer | Argentina | male |
| Laos | Soccer | International | male |
| Larissa | Soccer | Greece | male |
| Larne | Soccer | Northern Ireland | female |
| Las Palmas | Soccer | Spain | male |
| Las Vegas Aces | Basketball | USA | female |
| Las Vegas Raiders | Football | USA | male |
| LASK | Soccer | Austria | male |
| Latvia | Ice Hockey | International | male |
| Latvia | Soccer | International | male |
| Latvia | Basketball | International | male |
| Latvia U18 | Ice Hockey | International | male |
| Latvia U20 | Ice Hockey | International | male |
| Latvia U21 | Soccer | International | male |
| Laval | Football | Canada | male |
| Laval | Soccer | France | male |
| Laval Rocket | Ice Hockey | Canada | male |
| Lawrence Lui | Fighting | International | mixed |
| Lazio | Soccer | Italy | male |
| Lazio | Soccer | Italy | female |
| LDU Quito | Soccer | Ecuador | male |
| Le Havre | Soccer | France | male |
| Le Mans | Soccer | France | male |
| Le Mans | Basketball | France | male |
| Le Moyne | Basketball | USA | male |
| Learner Tien | Tennis | USA | mixed |
| Lebanon | Basketball | International | male |
| Lecce | Soccer | Italy | male |
| Lech Poznań | Soccer | Poland | male |
| Lechia Gdańsk | Soccer | Poland | male |
| Leeds United | Soccer | England | male |
| Leganés | Soccer | Spain | male |
| Legia Warszawa | Soccer | Poland | male |
| Legia Warszawa U19 | Soccer | Poland | male |
| Leicester City | Soccer | England | male |
| Leicester City WFC | Soccer | England | female |
| Leicester Riders | Basketball | United Kingdom | male |
| Lens | Soccer | France | male |
| León | Soccer | Mexico | male |
| Leon Shahbazyan | Fighting | USA | mixed |
| Leon Shahbazyan | Fighting | International | mixed |
| Leones del Escogido | Baseball | Dominican Republic | male |
| Lerone Murphy | Fighting | International | mixed |
| Lerryan Douglas | Fighting | International | mixed |
| Lesotho | Soccer | International | male |
| Levadiakos | Soccer | Greece | male |
| Levan Chokheli | Fighting | Georgia | mixed |
| Levan Chokheli | Fighting | International | mixed |
| Levante | Soccer | Spain | male |
| Levante | Soccer | Spain | female |
| Levante Las Planas | Soccer | Spain | female |
| Levi Rodrigues | Fighting | International | mixed |
| Levicki Patrioti | Basketball | Slovakia | male |
| Levski Sofia | Soccer | Bulgaria | male |
| Lexington SC | Soccer | USA | female |
| Leyma Coruna | Basketball | Spain | male |
| Leyton Orient | Soccer | England | male |
| Liam Davies | Fighting | International | mixed |
| Libertad | Soccer | Paraguay | male |
| Libertad | Soccer | Ecuador | male |
| Liberty | Football | USA | male |
| Libya | Basketball | International | male |
| Liechtenstein | Soccer | International | female |
| Liechtenstein | Soccer | International | male |
| Lille | Soccer | France | male |
| Lillestrøm | Soccer | Norway | male |
| Lincoln City | Soccer | England | male |
| Linda Noskova | Tennis | Czech Republic | mixed |
| Lindenwood | Ice Hockey | USA | female |
| Lithuania | Basketball | International | male |
| Lithuania | Soccer | International | male |
| Lithuania U17 | Basketball | International | male |
| Liverpool | Soccer | England | female |
| Liverpool | Basketball | United Kingdom | male |
| Liverpool FC | Soccer | England | male |
| Liverpool Montevideo | Soccer | Uruguay | male |
| Liverpool U19 | Soccer | England | male |
| Logroño | Soccer | Spain | female |
| Loma Lookboonmee | Fighting | International | mixed |
| Lommel | Soccer | Belgium | male |
| London City Lionesses | Soccer | England | female |
| London Lions | Basketball | United Kingdom | male |
| Lone'er Kavanagh | Fighting | International | mixed |
| Long Island Nets | Basketball | USA | male |
| Long Island University | Football | USA | male |
| Long Island University | Basketball | USA | male |
| Lorenzo Musetti | Tennis | Italy | mixed |
| Lorient | Soccer | France | male |
| Los Angeles Angels | Baseball | USA | male |
| Los Angeles Chargers | Football | USA | male |
| Los Angeles Clippers | Basketball | USA | male |
| Los Angeles Dodgers | Baseball | USA | male |
| Los Angeles FC | Soccer | USA | male |
| Los Angeles Galaxy | Soccer | USA | male |
| Los Angeles Kings | Ice Hockey | USA | male |
| Los Angeles Lakers | Basketball | USA | male |
| Los Angeles Rams | Football | USA | male |
| Los Angeles Sparks | Basketball | USA | female |
| Losene Keita | Fighting | International | mixed |
| Louie Sutherland | Fighting | International | mixed |
| Louis Jourdain | Fighting | International | mixed |
| Louisiana | Football | USA | male |
| Louisville | Basketball | USA | female |
| Louisville | Football | USA | male |
| Louisville | Basketball | USA | male |
| Louisville | Baseball | USA | male |
| Louisville Kings | Football | USA | male |
| LOVB Atlanta | USA | female | |
| LOVB Austin | USA | female | |
| LOVB Houston | USA | female | |
| LOVB Madison | USA | female | |
| LOVB Nebraska | USA | female | |
| LOVB Salt Lake | USA | female | |
| LSU | Basketball | USA | female |
| LSU | Football | USA | male |
| LSU | Baseball | USA | male |
| Luan Lacerda | Fighting | International | mixed |
| Luana Santos | Fighting | International | mixed |
| Lublin | Soccer | Poland | male |
| Lucas Armand | Fighting | International | mixed |
| Lucas Brennan | Fighting | International | mixed |
| Lucas Fernando | Fighting | International | mixed |
| Lucia Szabova | Fighting | International | mixed |
| Luciano Darderi | Tennis | Italy | mixed |
| Ludogorets | Soccer | Bulgaria | male |
| Ludovit Klein | Fighting | International | mixed |
| Luis Felipe Dias | Fighting | International | mixed |
| Luis Gurule | Fighting | International | mixed |
| Luis Hernandez | Fighting | International | mixed |
| Luke Fernandez | Fighting | International | mixed |
| Luke Riley | Fighting | International | mixed |
| Luleå HF | Ice Hockey | Sweden | male |
| Lupita Godinez | Fighting | International | mixed |
| Luton Town | Soccer | England | male |
| Luxembourg | Soccer | International | male |
| Lyon | Soccer | France | male |
| Lyon | Soccer | France | female |
| Macará | Soccer | Ecuador | male |
| Maccabi Tel Aviv | Soccer | Israel | male |
| Macclesfield | Soccer | England | male |
| Macclesfield Town | Soccer | England | male |
| Mackenzie Dern | Fighting | International | mixed |
| Macy Chiasson | Fighting | International | mixed |
| Madagascar | Basketball | International | male |
| Madison Capitols | Ice Hockey | USA | male |
| Madrid | Soccer | Spain | female |
| Magdeburg | Soccer | Germany | male |
| Magomed Ankalaev | Fighting | Russia | mixed |
| Magomed Tuchalov | Fighting | International | mixed |
| Magomed Zaynukov | Fighting | International | mixed |
| Maidenhead United | Soccer | England | male |
| Maidstone United | Soccer | England | male |
| Maine Celtics | Basketball | USA | male |
| Mainz 05 | Soccer | Germany | female |
| Maja Chwalinska | Tennis | Poland | mixed |
| Maktown Flyers (Nga) | Basketball | International | male |
| Málaga | Soccer | Spain | male |
| Malawi | Soccer | International | male |
| Malawi | Soccer | International | female |
| Malaysia | Soccer | International | male |
| Malcolm Wellmaker | Fighting | International | mixed |
| Mali | Basketball | International | female |
| Mali | Soccer | International | male |
| Mali | Basketball | International | male |
| Mallorca | Soccer | Spain | male |
| Malmö FF | Soccer | Sweden | male |
| Malmö Redhawks | Ice Hockey | Sweden | male |
| Malta | Soccer | International | male |
| Malta U21 | Soccer | International | male |
| Mamelodi Sundowns | Soccer | South Africa | male |
| Manchester Basketball | Basketball | United Kingdom | male |
| Manchester Basketball W | Basketball | United Kingdom | female |
| Manchester City | Soccer | England | female |
| Manchester City | Soccer | England | male |
| Manchester City U18 | Soccer | England | male |
| Manchester City U19 | Soccer | International | male |
| Manchester United | Soccer | England | female |
| Manchester United | Soccer | England | male |
| Manchester United U18 | Soccer | England | male |
| Mandel Nallo | Fighting | International | mixed |
| Manel Kape | Fighting | International | mixed |
| Manitoba Moose | Ice Hockey | USA | male |
| Manoel Sousa | Fighting | International | mixed |
| Manolo Zecchini | Fighting | International | mixed |
| Manon Fiorot | Fighting | International | mixed |
| Manresa | Basketball | Spain | male |
| Mansfield Town | Soccer | England | male |
| Mansur Abdul-Malik | Fighting | International | mixed |
| Mantas Kondratavicius | Fighting | International | mixed |
| Mantova | Soccer | Italy | male |
| Manuel Torres | Fighting | International | mixed |
| Marathón | Soccer | Honduras | male |
| Marc-Andre Barriault | Fighting | International | mixed |
| Marcin Tybura | Fighting | Poland | mixed |
| Marcio Barbosa | Fighting | International | mixed |
| Marco Tulio | Fighting | Brazil | mixed |
| Marcus Almeida | Fighting | International | mixed |
| Marcus McGhee | Fighting | International | mixed |
| Marina Spasic | Fighting | International | mixed |
| Marine | Soccer | England | male |
| Mario Barrios | Fighting | International | mixed |
| Mario Bautista | Fighting | International | mixed |
| Mario Pinto | Fighting | International | mixed |
| Marítimo | Soccer | Portugal | male |
| Mark Vologdin | Fighting | International | mixed |
| Marlon Vera | Fighting | International | mixed |
| Marquel Mederos | Fighting | International | mixed |
| Marquette | Basketball | USA | male |
| Marquette | Basketball | USA | female |
| Marshall | Football | USA | male |
| Marta Kostyuk | Tennis | International | mixed |
| Martin Landaluce | Tennis | Spain | male |
| Martinique | Soccer | International | male |
| Martinique U20 | Soccer | International | male |
| Marvin Vettori | Fighting | International | mixed |
| Marwan Rahiki | Fighting | International | mixed |
| Maryland | Basketball | USA | male |
| Maryland | Basketball | USA | female |
| Maryland | Football | USA | male |
| Mason Jones | Fighting | International | mixed |
| Mateusz Gamrot | Fighting | International | mixed |
| Mateusz Rebecki | Fighting | International | mixed |
| Matheus Camilo | Fighting | International | mixed |
| Matt Schnell | Fighting | International | mixed |
| Matteo Arnaldi | Tennis | International | mixed |
| Matteo Berrettini | Tennis | International | mixed |
| Matthieu Letho Duclos | Fighting | International | mixed |
| Mauricio Ruffy | Fighting | International | mixed |
| Mauritania | Soccer | International | male |
| Mauritania | Soccer | International | female |
| Max Griffin | Fighting | USA | mixed |
| Max Holloway | Fighting | International | mixed |
| Maycee Barber | Fighting | International | mixed |
| Mayra Silva | Fighting | International | mixed |
| MC Alger | Soccer | Algeria | male |
| McGill | Football | Canada | male |
| McNeese St | Football | USA | male |
| Mechelen | Soccer | Belgium | male |
| Mehemmedali Osmanli | Fighting | International | mixed |
| Melissa Amaya | Fighting | International | mixed |
| Melissa Croden | Fighting | International | mixed |
| Melissa Gatto | Fighting | International | mixed |
| Melissa Mullins | Fighting | International | mixed |
| Melquizael Costa | Fighting | International | mixed |
| Melsik Baghdasaryan | Fighting | International | mixed |
| Memphis | Basketball | USA | male |
| Memphis | Football | USA | male |
| Memphis Grizzlies | Basketball | USA | male |
| Memphis Hustle | Basketball | USA | male |
| Meng Ding | Fighting | International | mixed |
| Merab Dvalishvili | Fighting | Georgia | mixed |
| Mercer | Football | USA | male |
| Mercyhurst | Ice Hockey | USA | female |
| Mersin BŞB | Basketball | Turkiye | male |
| Merthyr Town | Soccer | Wales | male |
| Metz | Soccer | France | male |
| Mexico | Soccer | International | male |
| Mexico | Basketball | International | male |
| Mexico | Basketball | International | female |
| Mexico | Baseball | International | male |
| Mexico U20 | Soccer | International | female |
| Mexico U20 | Soccer | International | male |
| Miami | Basketball | USA | male |
| Miami | Football | USA | male |
| Miami (OH) | Football | USA | male |
| Miami Dolphins | Football | USA | male |
| Miami Heat | Basketball | USA | male |
| Miami Marlins | Baseball | USA | male |
| Michael Aljarouj | Fighting | International | mixed |
| Michael Aswell | Fighting | International | mixed |
| Michael Chandler | Fighting | International | mixed |
| Michael Chiesa | Fighting | USA | mixed |
| Michael Johnson | Fighting | USA | mixed |
| Michael Oliveira | Fighting | International | mixed |
| Michael Page | Fighting | International | mixed |
| Michael Parkin | Fighting | International | mixed |
| Michal Oleksiejczuk | Fighting | International | mixed |
| Michel Pereira | Fighting | Brazil | mixed |
| Michelle Montague | Fighting | International | mixed |
| Michigan | Basketball | USA | female |
| Michigan | Basketball | USA | male |
| Michigan | Ice Hockey | USA | male |
| Michigan | Football | USA | male |
| Michigan State | Ice Hockey | USA | male |
| Michigan State | Basketball | USA | female |
| Michigan State | Basketball | USA | male |
| Michigan State | Football | USA | male |
| Michigan State | Baseball | USA | male |
| Mickey Gall | Fighting | International | mixed |
| Middlesbrough | Soccer | England | male |
| Mikaela Mayer | Fighting | USA | mixed |
| Mike Davis | Fighting | International | mixed |
| Mike Malott | Fighting | International | mixed |
| Miles Johns | Fighting | USA | mixed |
| Millonarios | Soccer | Colombia | male |
| Millwall | Soccer | England | male |
| Milos Janicic | Fighting | International | mixed |
| Milton Keynes Dons | Soccer | England | male |
| Milwaukee Admirals | Ice Hockey | USA | male |
| Milwaukee Brewers | Baseball | USA | male |
| Milwaukee Bucks | Basketball | USA | male |
| Minnesota | Basketball | USA | male |
| Minnesota | Basketball | USA | female |
| Minnesota | Football | USA | male |
| Minnesota | Ice Hockey | USA | female |
| Minnesota | Ice Hockey | USA | male |
| Minnesota | Baseball | USA | male |
| Minnesota Duluth | Ice Hockey | USA | male |
| Minnesota Frost | Ice Hockey | USA | female |
| Minnesota Lynx | Basketball | USA | female |
| Minnesota State | Ice Hockey | USA | female |
| Minnesota Timberwolves | Basketball | USA | male |
| Minnesota Twins | Baseball | USA | male |
| Minnesota United | Soccer | USA | male |
| Minnesota Vikings | Football | USA | male |
| Minnesota Wild | Ice Hockey | USA | male |
| Miomir Kecmanovic | Tennis | Serbia | mixed |
| Mirassol | Soccer | Brazil | male |
| Mirra Andreeva | Tennis | Russia | mixed |
| Mississippi | Basketball | USA | female |
| Mississippi | Football | USA | male |
| Mississippi | Basketball | USA | male |
| Mississippi | Baseball | USA | male |
| Mississippi State | Football | USA | male |
| Mississippi State | Baseball | USA | male |
| Missouri | Football | USA | male |
| Missouri State | Football | USA | male |
| Mitch Ramirez | Fighting | International | mixed |
| Mitch Raposo | Fighting | International | mixed |
| Mixco | Soccer | Guatemala | male |
| Modena | Soccer | Italy | male |
| Modestas Bukauskas | Fighting | International | mixed |
| Moldova | Soccer | International | male |
| Monaco | Soccer | France | male |
| Monaco U19 | Soccer | International | male |
| Monagas | Soccer | Venezuela | male |
| Moncton Wildcats | Ice Hockey | Canada | male |
| Montana State | Football | USA | male |
| Montel Jackson | Fighting | International | mixed |
| Montenegro | Basketball | International | male |
| Montenegro | Soccer | International | male |
| Monterrey | Soccer | Mexico | male |
| Montpellier | Soccer | France | male |
| Montreal | Ice Hockey | USA | female |
| Montreal | Football | Canada | male |
| Montreal Alliance | Basketball | Canada | male |
| Montreal Alouettes | Football | Canada | male |
| Montreal Canadiens | Ice Hockey | USA | male |
| Montréal Roses | Soccer | Canada | female |
| Montserrat Rendon | Fighting | International | mixed |
| Monza | Soccer | Italy | male |
| MoraBanc Andorra | Basketball | Spain | male |
| Morecambe | Soccer | England | male |
| Morgan Charriere | Fighting | International | mixed |
| Morocco | Soccer | International | male |
| Morocco | Soccer | International | female |
| Moses Itauma | Fighting | International | mixed |
| Motagua | Soccer | Honduras | male |
| Motor City Cruise | Basketball | USA | male |
| Mount Pleasant Academy | Soccer | Jamaica | male |
| Movsar Evloev | Fighting | International | mixed |
| Mozambique | Soccer | International | male |
| Mozambique U17 | Soccer | International | male |
| Muhammad Said | Fighting | International | mixed |
| Muhammadjon Naimov | Fighting | International | mixed |
| Muin Gafurov | Fighting | International | mixed |
| Municipal | Soccer | Guatemala | male |
| Murcia | Basketball | Spain | male |
| Murtazali Magomedov | Fighting | International | mixed |
| Muskegon Lumberjacks | Ice Hockey | USA | male |
| Muslim Salikhov | Fighting | International | mixed |
| Myanmar | Soccer | International | male |
| Myktybek Orolbai | Fighting | International | mixed |
| NAC Breda | Soccer | Netherlands | male |
| Nacional | Soccer | Uruguay | male |
| Nacional | Basketball | Uruguay | male |
| Nacional Potosí | Soccer | Bolivia | male |
| Nairobi City Thunder | Basketball | Kenya | male |
| Namibia | Soccer | International | male |
| Namsrai Batbayar | Fighting | International | mixed |
| Nantes | Soccer | France | male |
| Naomi Osaka | Tennis | Japan | mixed |
| Napoli | Soccer | Italy | male |
| Napoli | Soccer | Italy | female |
| Nashville Predators | Ice Hockey | USA | male |
| Nashville SC | Soccer | USA | male |
| Nasrat Haqparast | Fighting | International | mixed |
| Natalia Silva | Fighting | International | mixed |
| Nate Landwehr | Fighting | USA | mixed |
| Nathaniel Collins | Fighting | International | mixed |
| Nathaniel Wood | Fighting | England | mixed |
| National League All-Stars | Basketball | USA | male |
| Navajo Stirling | Fighting | International | mixed |
| Navy | Football | USA | male |
| Nazim Sadykhov | Fighting | International | mixed |
| NC State | Basketball | USA | female |
| NC State | Basketball | USA | male |
| NC State | Football | USA | male |
| Nebraska | Basketball | USA | male |
| Nebraska | Basketball | USA | female |
| Nebraska | Football | USA | male |
| NEC | Soccer | Netherlands | male |
| Necaxa | Soccer | Mexico | male |
| Neil Magny | Fighting | USA | mixed |
| Netherlands | Soccer | International | male |
| Netherlands | Baseball | International | male |
| Netherlands | Basketball | International | male |
| Nevada | Football | USA | male |
| New Caledonia | Soccer | International | male |
| New Caledonia | Soccer | International | female |
| New Caledonia U20 W | Soccer | International | female |
| New England Patriots | Football | USA | male |
| New England Revolution | Soccer | USA | male |
| New Haven | Basketball | USA | male |
| New Jersey Devils | Ice Hockey | USA | male |
| New Mexico | Basketball | USA | male |
| New Mexico | Football | USA | male |
| New Mexico State | Football | USA | male |
| New Orleans Pelicans | Basketball | USA | male |
| New Orleans Saints | Football | USA | male |
| New York City | Soccer | USA | male |
| New York City FC II | Soccer | USA | male |
| New York Giants | Football | USA | male |
| New York Islanders | Ice Hockey | USA | male |
| New York Jets | Football | USA | male |
| New York Knicks | Basketball | USA | male |
| New York Liberty | Basketball | USA | female |
| New York Mets | Baseball | USA | male |
| New York Rangers | Ice Hockey | USA | male |
| New York Red Bulls | Soccer | USA | male |
| New York Sirens | Ice Hockey | USA | female |
| New York Yankees | Baseball | USA | male |
| New Zealand | Soccer | International | male |
| New Zealand | Basketball | International | male |
| New Zealand | Basketball | International | female |
| New Zealand U20 | Soccer | International | female |
| Newcastle Eagles | Basketball | United Kingdom | male |
| Newcastle United | Soccer | England | male |
| Newfoundland | Ice Hockey | USA | male |
| Newport County | Soccer | Wales | male |
| NFC | Football | USA | male |
| Niagara IceDogs | Ice Hockey | Canada | male |
| Niagara River | Basketball | Canada | male |
| Nicaragua | Baseball | International | male |
| Nicaragua | Basketball | International | male |
| Nicaragua | Soccer | International | male |
| Nice | Soccer | France | male |
| Nick Klein | Fighting | International | mixed |
| Nicolle Caliari | Fighting | Brazil | mixed |
| Nieciecza | Soccer | Poland | male |
| Niger | Soccer | International | male |
| Nigeria | Basketball | International | female |
| Nigeria | Soccer | International | male |
| Nigeria | Soccer | International | female |
| Nigeria | Basketball | International | male |
| Nigeria U20 | Soccer | International | female |
| Nikita Krylov | Fighting | Ukraine | mixed |
| Niko Price | Fighting | USA | mixed |
| Nikolay Veretennikov | Fighting | International | mixed |
| Nilson Rojas | Fighting | International | mixed |
| Nina Nikolija Milosevic | Fighting | International | mixed |
| Noah | Soccer | Armenia | male |
| Noah Gugnon | Fighting | International | mixed |
| Noblesville Boom | Basketball | USA | male |
| Nora Cornolle | Fighting | International | mixed |
| Norfolk Admirals | Ice Hockey | USA | male |
| Norma Dumont | Fighting | International | mixed |
| North Bay Battalion | Ice Hockey | Canada | male |
| North Carolina | Basketball | USA | male |
| North Carolina | Basketball | USA | female |
| North Carolina | Baseball | USA | male |
| North Carolina | Football | USA | male |
| North Carolina Courage | Soccer | USA | female |
| North Dakota | Ice Hockey | USA | male |
| North Dakota | Football | USA | male |
| North Dakota State | Football | USA | male |
| North Macedonia | Soccer | International | male |
| North Texas | Basketball | USA | male |
| North Texas | Football | USA | male |
| Northampton Town | Soccer | England | male |
| Northeastern | Ice Hockey | USA | female |
| Northeastern | Baseball | USA | male |
| Northern Illinois | Football | USA | male |
| Northern Iowa | Football | USA | male |
| Northern Ireland | Soccer | International | male |
| Northwestern | Basketball | USA | male |
| Northwestern | Football | USA | male |
| Northwestern | Basketball | USA | female |
| Norway | Soccer | International | male |
| Norway | Ice Hockey | International | male |
| Norway | Soccer | International | female |
| Norway U18 | Ice Hockey | International | male |
| Norwich City | Soccer | England | male |
| Notre Dame | Basketball | USA | female |
| Notre Dame | Ice Hockey | USA | male |
| Notre Dame | Baseball | USA | male |
| Notre Dame | Football | USA | male |
| Notre Dame | Basketball | USA | male |
| Nottingham Forest | Soccer | England | male |
| Notts County | Soccer | England | male |
| Novak Djokovic | Tennis | Serbia | mixed |
| Nuno Borges | Tennis | International | mixed |
| Nürnberg | Soccer | Germany | female |
| Nursulton Ruzibaev | Fighting | International | mixed |
| Nurullo Aliev | Fighting | International | mixed |
| Nyamjargal Tumendemberel | Fighting | International | mixed |
| Nymburk | Basketball | Czech Republic | male |
| O'Higgins | Soccer | Chile | male |
| Oban Elliott | Fighting | International | mixed |
| Obradoiro CAB | Basketball | Spain | male |
| Ode Osbourne | Fighting | International | mixed |
| Odense Bulldogs | Ice Hockey | Denmark | male |
| OFI | Soccer | Greece | male |
| OH Leuven | Soccer | Belgium | male |
| OH Leuven | Soccer | Belgium | female |
| Ohio | Football | USA | male |
| Ohio State | Football | USA | male |
| Ohio State | Basketball | USA | male |
| Ohio State | Basketball | USA | female |
| Ohio State | Ice Hockey | USA | male |
| Ohio State | Ice Hockey | USA | female |
| Oklahoma | Basketball | USA | female |
| Oklahoma | Basketball | USA | male |
| Oklahoma | Baseball | USA | male |
| Oklahoma | Football | USA | male |
| Oklahoma City Baseball Club | Baseball | USA | male |
| Oklahoma City Blue | Basketball | USA | male |
| Oklahoma City Thunder | Basketball | USA | male |
| Oklahoma State | Football | USA | male |
| Oklahoma State | Basketball | USA | female |
| Oklahoma State | Basketball | USA | male |
| Oklahoma State | Baseball | USA | male |
| Old Dominion | Football | USA | male |
| Oldham Athletic | Soccer | England | male |
| Oleksandr Usyk | Fighting | International | mixed |
| Olimpia | Soccer | Honduras | male |
| Olimpia | Soccer | Paraguay | male |
| Ollie Schmid | Fighting | USA | mixed |
| Olympiakos Piraeus | Soccer | Greece | male |
| Olympique Marseille | Soccer | France | male |
| Olympique Marseille U19 | Soccer | International | male |
| Omaha Lancers | Ice Hockey | USA | male |
| Oman | Soccer | International | male |
| Omonia Nicosia | Soccer | Cyprus | male |
| Oregon | Baseball | USA | male |
| Oregon | Basketball | USA | male |
| Oregon | Basketball | USA | female |
| Oregon | Football | USA | male |
| Oregon State | Football | USA | male |
| Orense | Soccer | Ecuador | male |
| Orlando City | Soccer | USA | male |
| Orlando Magic | Basketball | USA | male |
| Orlando Pride | Soccer | USA | female |
| Orlando Solar Bears | Ice Hockey | USA | male |
| Orlando Storm | Football | USA | male |
| Osasuna | Soccer | Spain | male |
| Osceola Magic | Basketball | USA | male |
| Oshawa Generals | Ice Hockey | Canada | male |
| Osleys Iglesias | Fighting | International | mixed |
| Osnabrück | Soccer | Germany | male |
| Otari Tanzilovi | Fighting | Germany | mixed |
| Otari Tanzilovi | Fighting | International | mixed |
| Ottawa | Ice Hockey | USA | female |
| Ottawa 67s | Ice Hockey | Canada | male |
| Ottawa Blackjacks | Basketball | Canada | male |
| Ottawa Rapid | Soccer | Canada | female |
| Ottawa RedBlacks | Football | Canada | male |
| Ottawa Senators | Ice Hockey | Canada | male |
| Oumar Sy | Fighting | International | mixed |
| Owen Sound Attack | Ice Hockey | Canada | male |
| Oxford City | Soccer | England | male |
| Oxford United | Soccer | England | male |
| Ozzy Diaz | Fighting | International | mixed |
| Pachuca | Soccer | Mexico | female |
| Pachuca | Soccer | Mexico | male |
| Pacific FC | Soccer | Canada | male |
| Paddy Pimblett | Fighting | International | mixed |
| Paderborn | Soccer | Germany | male |
| Pafos FC | Soccer | Cyprus | male |
| Pakistan | Soccer | International | female |
| Pakistan | Soccer | International | male |
| Palermo | Soccer | Italy | male |
| Palmeiras | Soccer | Brazil | male |
| Panaitolikos | Soccer | Greece | male |
| Panama | Baseball | International | male |
| Panama | Soccer | International | male |
| Panama | Basketball | International | male |
| Panama U20 | Soccer | International | male |
| Panathinaikos | Soccer | Greece | male |
| Panserraikos | Soccer | Greece | male |
| PAOK | Soccer | Greece | male |
| Paraguay | Soccer | International | male |
| Paris FC | Soccer | France | male |
| Paris FC | Soccer | France | female |
| Parma | Soccer | Italy | male |
| Parma | Soccer | Italy | female |
| Pat Sabatini | Fighting | International | mixed |
| Patricio Freire | Fighting | International | mixed |
| Paulo Henrique Costa | Fighting | International | mixed |
| Pavel Andrusca | Fighting | International | mixed |
| Pavel Silyagin | Fighting | International | mixed |
| Payton Talbott | Fighting | International | mixed |
| PEC Zwolle | Soccer | Netherlands | male |
| Peñarol | Soccer | Uruguay | male |
| Penn State | Basketball | USA | male |
| Penn State | Football | USA | male |
| Penn State | Basketball | USA | female |
| Penn State | Ice Hockey | USA | male |
| Peru | Soccer | International | male |
| Peterborough Petes | Ice Hockey | Canada | male |
| Peterborough Sports | Soccer | England | male |
| Peterborough United | Soccer | England | male |
| Petr Yan | Fighting | International | mixed |
| Petro Atletico | Basketball | International | male |
| Pezhman Seifkhani | Fighting | International | mixed |
| Phil Rowe | Fighting | International | mixed |
| Philadelphia 76ers | Basketball | USA | male |
| Philadelphia Eagles | Football | USA | male |
| Philadelphia Flyers | Ice Hockey | USA | male |
| Philadelphia Phillies | Baseball | USA | male |
| Philadelphia Union | Soccer | USA | male |
| Philippines | Basketball | International | male |
| Philippines | Basketball | International | female |
| Philippines | Soccer | International | male |
| Phoenix Mercury | Basketball | USA | female |
| Phoenix Suns | Basketball | USA | male |
| Piast Gliwice | Soccer | Poland | male |
| Piera Rodriguez | Fighting | International | mixed |
| Pisa | Soccer | Italy | male |
| Pittsburgh | Football | USA | male |
| Pittsburgh | Basketball | USA | male |
| Pittsburgh | Basketball | USA | female |
| Pittsburgh Penguins | Ice Hockey | USA | male |
| Pittsburgh Pirates | Baseball | USA | male |
| Pittsburgh Steelers | Football | USA | male |
| Platense | Soccer | Argentina | male |
| Plaza Amador | Soccer | Panama | male |
| Plymouth Argyle | Soccer | England | male |
| Pogoń Szczecin | Soccer | Poland | male |
| Poland | Basketball | International | male |
| Poland | Soccer | International | male |
| Poland U20 | Soccer | International | female |
| Polyana Viana | Fighting | International | mixed |
| Port Vale | Soccer | England | male |
| Portland Fire | Basketball | USA | female |
| Portland State | Football | USA | male |
| Portland Thorns | Soccer | USA | female |
| Portland Timbers | Soccer | USA | male |
| Portland Trail Blazers | Basketball | USA | male |
| Porto | Soccer | Portugal | male |
| Portsmouth | Soccer | England | male |
| Portugal | Soccer | International | male |
| Portugal | Basketball | International | male |
| Portugal U20 W | Soccer | International | female |
| Preston North End | Soccer | England | male |
| Preußen Münster | Soccer | Germany | male |
| Prince Albert Raiders | Ice Hockey | Canada | male |
| Priscila Cachoeira | Fighting | International | mixed |
| Promitheas | Basketball | Greece | male |
| Providence | Basketball | USA | male |
| Providence | Ice Hockey | USA | male |
| Providence | Basketball | USA | female |
| Providence Bruins | Ice Hockey | USA | male |
| PSG | Soccer | France | male |
| PSG | Soccer | France | female |
| PSG U19 | Soccer | International | male |
| PSV | Soccer | Netherlands | male |
| PSV U19 | Soccer | Netherlands | male |
| Puebla | Soccer | Mexico | male |
| Puerto Rico | Baseball | International | male |
| Puerto Rico | Basketball | International | female |
| Puerto Rico | Basketball | International | male |
| Pumas UNAM | Soccer | Mexico | male |
| Punahele Soriano | Fighting | International | mixed |
| Purdue | Basketball | USA | male |
| Purdue | Football | USA | male |
| Purdue | Basketball | USA | female |
| Purdue | Baseball | USA | male |
| Pyramids | Soccer | Egypt | male |
| Qarabag | Soccer | Azerbaijan | male |
| Qatar | Soccer | International | male |
| Qatar | Basketball | International | male |
| Qileng Aori | Fighting | International | mixed |
| Qinwen Zheng | Tennis | China | mixed |
| Quebec Remparts | Ice Hockey | Canada | male |
| Queens Park Rangers | Soccer | England | male |
| Querétaro | Soccer | Mexico | male |
| Quillan Salkilld | Fighting | International | mixed |
| Quinnipiac | Ice Hockey | USA | male |
| RAAL La Louvière | Soccer | Belgium | male |
| Racing | Soccer | Uruguay | male |
| Racing Club | Soccer | Argentina | male |
| Racing Louisville | Soccer | USA | female |
| Racing Santander | Soccer | Spain | male |
| Radcliffe Borough | Soccer | England | male |
| Radomiak Radom | Soccer | Poland | male |
| Rafa Garcia | Fighting | International | mixed |
| Rafael Dos Anjos | Fighting | Brazil | mixed |
| Rafael Fiziev | Fighting | International | mixed |
| Rafael Jodar | Tennis | Spain | mixed |
| Rafael Ramos Estevam | Fighting | International | mixed |
| Rafael Tobias | Fighting | International | mixed |
| Raków Częstochowa | Soccer | Poland | male |
| Ramazan Temirov | Fighting | International | mixed |
| Ramiz Brahimaj | Fighting | International | mixed |
| Randy Brown | Fighting | International | mixed |
| Rangbo Sulang | Fighting | International | mixed |
| Rangers F.C. | Soccer | Scotland | male |
| Raoni Barcelos | Fighting | International | mixed |
| Raphael Collignon | Tennis | Belgium | mixed |
| Raptors 905 | Basketball | USA | male |
| Raul Rosas Jr | Fighting | International | mixed |
| Ravena Oliveira | Fighting | International | mixed |
| Rayo Vallecano | Soccer | Spain | male |
| RB Bragantino | Soccer | Brazil | male |
| RB Leipzig | Soccer | Germany | male |
| RB Leipzig | Soccer | Germany | female |
| Reading | Soccer | England | male |
| Real Betis | Soccer | Spain | male |
| Real Betis U19 | Soccer | International | male |
| Real España | Soccer | Honduras | male |
| Real Madrid | Soccer | Spain | male |
| Real Madrid | Soccer | Spain | female |
| Real Madrid | Basketball | Spain | male |
| Real Madrid U19 | Soccer | International | male |
| Real Oviedo | Soccer | Spain | male |
| Real Salt Lake | Soccer | USA | male |
| Real Sociedad | Soccer | Spain | male |
| Real Sociedad | Soccer | Spain | female |
| Real Zaragoza | Soccer | Spain | male |
| Red Star Belgrade | Soccer | Serbia | male |
| Regina Tarin | Fighting | International | mixed |
| Rei Tsuruya | Fighting | International | mixed |
| Reims | Soccer | France | male |
| Reinier de Ridder | Fighting | International | mixed |
| Renato Carneiro | Fighting | International | mixed |
| Rennes | Soccer | France | male |
| Republic of Ireland | Soccer | International | male |
| Rice | Basketball | USA | female |
| Rice | Football | USA | male |
| Richard Harris | Fighting | International | mixed |
| Richie Miranda | Fighting | International | mixed |
| Ricky Simon | Fighting | International | mixed |
| Ricky Turcios | Fighting | International | mixed |
| Rico Verhoeven | Fighting | International | mixed |
| Rijeka | Soccer | Croatia | male |
| Rimouski Oceanic | Ice Hockey | Canada | male |
| Rinya Nakamura | Fighting | International | mixed |
| Rio Ave | Soccer | Portugal | male |
| Rio Grande Valley Vipers | Basketball | USA | male |
| River Plate | Soccer | Argentina | male |
| Rizvan Kuniev | Fighting | International | mixed |
| Rob Font | Fighting | International | mixed |
| Robelis Despaigne | Fighting | International | mixed |
| Robert Bryczek | Fighting | International | mixed |
| Robert Ruchala | Fighting | International | mixed |
| Robert Valentin | Fighting | International | mixed |
| Robert Whittaker | Fighting | International | mixed |
| Roberto Soldic | Fighting | International | mixed |
| Rochdale | Soccer | England | male |
| Rochester Americans | Ice Hockey | USA | male |
| Rochester Red Wings | Baseball | USA | male |
| Rockford IceHogs | Ice Hockey | USA | male |
| Rodez | Soccer | France | male |
| Rodolfo Bellato | Fighting | International | mixed |
| Rodolfo Viera | Fighting | International | mixed |
| Rodrigo Vera | Fighting | Peru | mixed |
| Rögle BK | Ice Hockey | Sweden | male |
| Roma | Soccer | Italy | male |
| Roma | Soccer | Italy | female |
| Roman Dolidze | Fighting | International | mixed |
| Roman Kopylov | Fighting | International | mixed |
| Roman Safiullin | Tennis | Russia | mixed |
| Romania | Basketball | International | male |
| Romania | Soccer | International | male |
| Rong Zhu | Fighting | International | mixed |
| Rosario Central | Soccer | Argentina | male |
| Rose Namajunas | Fighting | International | mixed |
| Rot-Weiss Essen | Soccer | Germany | male |
| Rouen | Soccer | France | male |
| Rouyn-Noranda Huskies | Ice Hockey | Canada | male |
| RSB Berkane | Soccer | Morocco | male |
| RSSB Tigers (Rwa) | Basketball | International | male |
| Rutgers | Basketball | USA | male |
| Rutgers | Football | USA | male |
| Rutgers | Basketball | USA | female |
| Rwanda | Basketball | International | male |
| Rwanda | Soccer | International | male |
| Ryan Gandra | Fighting | International | mixed |
| Ryan Garcia | Fighting | International | mixed |
| Ryan Kuse | Fighting | International | mixed |
| Ryan Spann | Fighting | International | mixed |
| Rytas | Basketball | Lithuania | male |
| Sabadell | Soccer | Spain | male |
| Sabah | Soccer | Azerbaijan | male |
| Sacramento Kings | Basketball | USA | male |
| Sacramento State | Football | USA | male |
| Saginaw Spirit | Ice Hockey | Canada | male |
| Said Nurmagomedov | Fighting | International | mixed |
| Saint Eloi Lupopo | Soccer | Congo DR | male |
| Saint John Sea Dogs | Ice Hockey | Canada | male |
| Saint Louis | Basketball | USA | male |
| Saint-Étienne | Soccer | France | male |
| Saint-Laurent | Soccer | Canada | male |
| Salahdine Parnasse | Fighting | International | mixed |
| Salford City | Soccer | England | male |
| Salisbury | Soccer | England | male |
| Sam Hughes | Fighting | International | mixed |
| Sam Patterson | Fighting | International | mixed |
| Sampdoria | Soccer | Italy | male |
| San Antonio Bulo Bulo | Soccer | International | male |
| San Antonio Spurs | Basketball | USA | male |
| San Diego | Soccer | USA | male |
| San Diego | Soccer | International | male |
| San Diego Padres | Baseball | USA | male |
| San Diego State | Football | USA | male |
| San Diego Wave | Soccer | USA | female |
| San Francisco 49ers | Football | USA | male |
| San Francisco Giants | Baseball | USA | male |
| San Jose Barracuda | Ice Hockey | USA | male |
| San Jose Earthquakes | Soccer | USA | male |
| San Jose Sharks | Ice Hockey | USA | male |
| San Jose State | Football | USA | male |
| San Lorenzo | Soccer | Argentina | male |
| San Marino | Soccer | International | male |
| San Pablo Burgos | Basketball | Spain | male |
| Sang-Wook Kim | Fighting | International | mixed |
| Santa Cruz Warriors | Basketball | USA | male |
| Santa Fe | Soccer | Colombia | male |
| Santiago Luna | Fighting | International | mixed |
| Santiago Ponzinibbio | Fighting | International | mixed |
| Santos | Soccer | Brazil | male |
| Santos Laguna | Soccer | Mexico | male |
| São Paulo | Soccer | Brazil | male |
| São Tomé e Príncipe | Soccer | International | male |
| Sarnia Sting | Ice Hockey | Canada | male |
| Saskatchewan Rattlers | Basketball | Canada | male |
| Saskatchewan Roughriders | Football | Canada | male |
| Saski Baskonia | Basketball | Spain | male |
| Sassuolo | Soccer | Italy | male |
| Sassuolo | Soccer | Italy | female |
| Saudi Arabia | Soccer | International | male |
| Saudi Arabia | Basketball | International | male |
| Sault Ste. Marie Greyhounds | Ice Hockey | Canada | male |
| Savannah Ghost Pirates | Ice Hockey | USA | male |
| Saygid Izagakhmaev | Fighting | International | mixed |
| SC Cambuur | Soccer | Netherlands | male |
| SC St. Tönis | Soccer | Germany | male |
| Scarborough | Soccer | England | male |
| Scarborough Athletic | Soccer | England | male |
| Scarborough Shooting Stars | Basketball | Canada | male |
| Schalke 04 | Soccer | Germany | male |
| Scotland | Soccer | International | male |
| Scranton/WB | Baseball | USA | male |
| Scunthorpe United | Soccer | England | male |
| Sean Brady | Fighting | International | mixed |
| Sean King | Fighting | International | mixed |
| Sean O'Malley | Fighting | International | mixed |
| Sean Sharaf | Fighting | USA | mixed |
| Sean Strickland | Fighting | International | mixed |
| Sean Woodson | Fighting | International | mixed |
| Seattle Kraken | Ice Hockey | USA | male |
| Seattle Mariners | Baseball | USA | male |
| Seattle Reign FC | Soccer | USA | female |
| Seattle Seahawks | Football | USA | male |
| Seattle Sounders | Soccer | USA | male |
| Seattle Storm | Basketball | USA | female |
| Seattle Torrent | Ice Hockey | USA | female |
| Sebastian Szalay | Fighting | International | mixed |
| Sedriques Dumas | Fighting | International | mixed |
| Senegal | Soccer | International | male |
| Senegal | Soccer | International | female |
| Senegal | Basketball | International | male |
| Senegal | Basketball | International | female |
| Seok-Hyun Ko | Fighting | International | mixed |
| Serbia | Basketball | International | male |
| Serbia | Soccer | International | male |
| Serbia U17 | Basketball | International | male |
| Sergey Pavlovich | Fighting | International | mixed |
| Sergey Spivak | Fighting | International | mixed |
| Seton Hall | Basketball | USA | male |
| Seton Hall | Basketball | USA | female |
| Sevilla | Soccer | Spain | male |
| Sevilla | Soccer | Spain | female |
| SGS Essen | Soccer | Germany | female |
| Shakhtar Donetsk | Soccer | Ukraine | male |
| Shakur Stevenson | Fighting | International | mixed |
| Shamil Gaziev | Fighting | International | mixed |
| Shane Collins | Fighting | USA | mixed |
| Shanelle Dyer | Fighting | International | mixed |
| Shaqueme Rock | Fighting | International | mixed |
| Shara Magomedov | Fighting | International | mixed |
| Shauna Bannon | Fighting | International | mixed |
| Shawinigan Cataractes | Ice Hockey | Canada | male |
| Sheffield Hatters | Basketball | United Kingdom | female |
| Sheffield Sharks | Basketball | United Kingdom | male |
| Sheffield United | Soccer | England | male |
| Sheffield Wednesday | Soccer | England | male |
| Sherbrooke | Football | Canada | male |
| Sherbrooke Phoenix | Ice Hockey | Canada | male |
| Shrewsbury Town | Soccer | England | male |
| Sierra Leone | Soccer | International | male |
| Sigma Olomouc | Soccer | Czech Republic | male |
| Simba | Soccer | Tanzania | male |
| Singapore | Soccer | International | male |
| Sint-Truiden | Soccer | Belgium | male |
| Sioux Falls Skyforce | Basketball | USA | male |
| SK Beveren | Soccer | Belgium | male |
| Skellefteå AIK | Ice Hockey | Sweden | male |
| Slavia Praha | Soccer | Czech Republic | male |
| Slough Town | Soccer | England | male |
| Slovakia | Ice Hockey | International | male |
| Slovakia | Soccer | International | male |
| Slovakia U18 | Ice Hockey | Slovakia | male |
| Slovakia U18 | Ice Hockey | International | female |
| Slovakia U20 | Ice Hockey | International | male |
| Slovan Bratislava | Soccer | Slovakia | male |
| Slovenia | Ice Hockey | International | male |
| Slovenia | Basketball | International | male |
| Slovenia | Soccer | International | female |
| Slovenia | Soccer | International | male |
| Slovenia U19 | Soccer | International | male |
| SMU | Basketball | USA | male |
| SMU | Football | USA | male |
| SMU | Basketball | USA | female |
| Sofia Montenegro | Fighting | International | mixed |
| Solihull Moors | Soccer | England | male |
| Solomon Islands | Soccer | International | male |
| Somalia | Soccer | International | male |
| South Africa | Soccer | International | male |
| South Bay Lakers | Basketball | USA | male |
| South Carolina | Basketball | USA | female |
| South Carolina | Baseball | USA | male |
| South Carolina | Football | USA | male |
| South Dakota State | Football | USA | male |
| South Korea | Baseball | International | male |
| South Korea | Basketball | International | male |
| South Shields | Soccer | England | male |
| South Sudan | Soccer | International | male |
| South Sudan | Basketball | International | male |
| South Sudan | Basketball | International | female |
| Southampton | Soccer | England | male |
| Southend United | Soccer | England | male |
| Southern Cal | Basketball | USA | male |
| Southern Cal | Basketball | USA | female |
| Southern Cal | Football | USA | male |
| Southern Illinois | Football | USA | male |
| Southern Mississippi | Baseball | USA | male |
| Southport | Soccer | England | male |
| Spain | Soccer | International | male |
| Spain | Basketball | International | female |
| Spain | Basketball | International | male |
| Spain U20 | Soccer | International | female |
| Sparta Praha | Soccer | Czech Republic | male |
| Sparta Rotterdam | Soccer | Netherlands | male |
| Spennymoor Town | Soccer | England | male |
| Spokane Zephyr | Soccer | USA | female |
| Sporting Braga | Soccer | Portugal | male |
| Sporting Charleroi | Soccer | Belgium | male |
| Sporting CP | Soccer | Portugal | male |
| Sporting CP U19 | Soccer | International | male |
| Sporting Cristal | Soccer | Peru | male |
| Sporting JAX | Soccer | USA | female |
| Sporting Kansas City | Soccer | USA | male |
| Sporting San Miguelito | Soccer | Panama | male |
| Sportivo Trinidense | Soccer | Paraguay | male |
| Springfield Thunderbirds | Ice Hockey | USA | male |
| St. Francis (PA) | Basketball | USA | male |
| St. John's | Basketball | USA | male |
| St. Kitts and Nevis | Soccer | International | male |
| St. Louis Battlehawks | Football | USA | male |
| St. Louis Blues | Ice Hockey | USA | male |
| St. Louis Cardinals | Baseball | USA | male |
| St. Louis City | Soccer | USA | male |
| St. Lucia | Soccer | International | male |
| St. Paul | Baseball | USA | male |
| St. Pauli | Soccer | Germany | male |
| St. Vincent & The Grenadines | Soccer | International | male |
| Standard Liège | Soccer | Belgium | male |
| Stanford | Basketball | USA | female |
| Stanford | Football | USA | male |
| Stanford | Basketball | USA | male |
| Stanley Dorsainvil | Fighting | International | mixed |
| Stefanos Tsitsipas | Tennis | Greece | mixed |
| Stephanie Han | Fighting | International | mixed |
| Stephanie Luciano | Fighting | International | mixed |
| Stephen Erceg | Fighting | International | mixed |
| Steve Garcia | Fighting | International | mixed |
| Steven Asplund | Fighting | International | mixed |
| Steven Koslow | Fighting | International | mixed |
| Stevenage | Soccer | England | male |
| Stewart Nicoll | Fighting | International | mixed |
| Stockport County | Soccer | England | male |
| Stoke City | Soccer | England | male |
| Stonehill | Basketball | USA | male |
| Strasbourg | Soccer | France | male |
| Sturm Graz | Soccer | Austria | male |
| Stuttgart | Soccer | Germany | female |
| Su Mudaerji | Fighting | International | mixed |
| Su-Young Yu | Fighting | International | mixed |
| Subotica | Basketball | Serbia | male |
| Sudan | Soccer | International | male |
| Sudbury Wolves | Ice Hockey | Canada | male |
| Südtirol | Soccer | Italy | male |
| Sunderland | Soccer | England | male |
| Sunderland U18 | Soccer | England | male |
| Supra du Quebec | Soccer | Canada | male |
| Suriname | Soccer | International | male |
| Surrey 89ers | Basketball | United Kingdom | male |
| Sutton United | Soccer | England | male |
| Swansea City | Soccer | Wales | male |
| Sweden | Ice Hockey | International | male |
| Sweden | Soccer | International | male |
| Sweden | Ice Hockey | International | female |
| Sweden | Basketball | International | male |
| Sweden U18 | Ice Hockey | International | male |
| Sweden U18 | Ice Hockey | International | female |
| Sweden U20 | Ice Hockey | International | male |
| Swindon Town | Soccer | England | male |
| Switzerland | Ice Hockey | International | female |
| Switzerland | Ice Hockey | International | male |
| Switzerland | Soccer | International | male |
| Switzerland | Basketball | International | male |
| Switzerland U18 | Ice Hockey | International | female |
| Switzerland U18 | Ice Hockey | International | male |
| Switzerland U20 | Ice Hockey | International | male |
| Syracuse | Basketball | USA | male |
| Syracuse | Basketball | USA | female |
| Syracuse | Football | USA | male |
| Syracuse Crunch | Ice Hockey | USA | male |
| Syria | Basketball | International | male |
| Syria | Soccer | International | male |
| Szolnoki Olaj | Basketball | Hungary | male |
| Tabatha Ricci | Fighting | International | mixed |
| Tahir Abdullaev | Fighting | International | mixed |
| Tahir Abdullayev | Fighting | Russia | mixed |
| Tahoe Knight Monsters | Ice Hockey | USA | male |
| Tai Tuivasa | Fighting | International | mixed |
| Tainara Lisboa | Fighting | International | mixed |
| Tajikistan | Soccer | International | male |
| Takuma Inoue | Fighting | International | mixed |
| Talita Alencar | Fighting | International | mixed |
| Tallison Teixeira | Fighting | International | mixed |
| Tampa Bay Buccaneers | Football | USA | male |
| Tampa Bay Lightning | Ice Hockey | USA | male |
| Tampa Bay Rays | Baseball | USA | male |
| Tampa Bay Sun | Soccer | USA | female |
| Tamworth | Soccer | England | male |
| Tanner Boser | Fighting | International | mixed |
| Tanzania | Soccer | International | female |
| Tanzania | Soccer | International | male |
| Tanzania U20 W | Soccer | International | female |
| Tatiana Suarez | Fighting | International | mixed |
| Tatsuro Taira | Fighting | International | mixed |
| Taylor Fritz | Tennis | USA | mixed |
| Taylor Townsend | Tennis | USA | mixed |
| TBD | Basketball | International | mixed |
| TCU | Basketball | USA | female |
| TCU | Football | USA | male |
| TCU | Basketball | USA | male |
| Telstar | Soccer | Netherlands | male |
| Temple | Football | USA | male |
| Temple | Basketball | USA | female |
| Tenerife | Basketball | Spain | male |
| Tenerife | Soccer | Spain | female |
| Tenerife | Soccer | Spain | male |
| Tennessee | Basketball | USA | male |
| Tennessee | Basketball | USA | female |
| Tennessee | Football | USA | male |
| Tennessee | Baseball | USA | male |
| Tennessee Titans | Football | USA | male |
| Tenshin Nasukawa | Fighting | International | mixed |
| Teodora Kostovic | Tennis | International | mixed |
| Teofimo Lopez | Fighting | International | mixed |
| Ternana | Soccer | Italy | female |
| Terrance Chatman | Fighting | International | mixed |
| Terrance McKinney | Fighting | International | mixed |
| Texas | Basketball | USA | female |
| Texas | Football | USA | male |
| Texas | Baseball | USA | male |
| Texas A&M | Football | USA | male |
| Texas A&M | Baseball | USA | male |
| Texas Rangers | Baseball | USA | male |
| Texas Stars | Ice Hockey | USA | male |
| Texas State | Football | USA | male |
| Texas Tech | Basketball | USA | male |
| Texas Tech | Football | USA | male |
| Thailand | Soccer | International | female |
| Thailand | Soccer | International | male |
| The Strongest | Soccer | Bolivia | male |
| Themba Gorimbo | Fighting | International | mixed |
| Theo Allotey | Fighting | Ghana | mixed |
| Theodor Berggren | Fighting | International | mixed |
| Thiago Moises | Fighting | Brazil | mixed |
| Thiago Moises | Fighting | International | mixed |
| Thomas Gantt Jr. | Fighting | International | mixed |
| Thomas Petersen | Fighting | International | mixed |
| Tigre | Soccer | Argentina | male |
| Tigres UANL | Soccer | Mexico | male |
| Tijuana | Soccer | Mexico | male |
| Tim Elliott | Fighting | International | mixed |
| Timor-Leste | Soccer | International | male |
| Timothy Cuamba | Fighting | International | mixed |
| Tofas | Basketball | Turkiye | male |
| Tofiq Musayev | Fighting | International | mixed |
| Tokyo | Soccer | Japan | male |
| Toledo | Football | USA | male |
| Toledo Walleye | Ice Hockey | USA | male |
| Toluca | Soccer | Mexico | male |
| Tom Nolan | Fighting | International | mixed |
| Tomateros | Baseball | Mexico | male |
| Tommy Mcmillen | Fighting | International | mixed |
| Tonbridge Angels | Soccer | England | male |
| Torino | Soccer | Italy | male |
| Toronto | Ice Hockey | USA | female |
| Toronto Argonauts | Football | Canada | male |
| Toronto Blue Jays | Baseball | USA | male |
| Toronto FC | Soccer | Canada | male |
| Toronto Maple Leafs | Ice Hockey | USA | male |
| Toronto Marlies | Ice Hockey | Canada | male |
| Toronto Raptors | Basketball | Canada | male |
| Toronto Tempo | Basketball | Canada | female |
| Torquay United | Soccer | England | male |
| Torque | Soccer | Uruguay | male |
| Torreense | Soccer | Portugal | male |
| Torrez Finney | Fighting | International | mixed |
| Tottenham Hotspur | Soccer | England | female |
| Tottenham Hotspur | Soccer | England | male |
| Tottenham Hotspur U19 | Soccer | International | male |
| Toulouse | Soccer | France | male |
| Trabzonspor | Soccer | Turkiye | male |
| Tracy Cortez | Fighting | International | mixed |
| Tranmere Rovers | Soccer | England | male |
| Trapani | Basketball | Italy | male |
| Tresean Gore | Fighting | International | mixed |
| Trevor Peek | Fighting | International | mixed |
| Trey Ogden | Fighting | International | mixed |
| Trieste | Basketball | Italy | male |
| Trinidad and Tobago | Soccer | International | male |
| Trinidad and Tobago | Soccer | International | female |
| Trois-Rivieres Lions | Ice Hockey | USA | male |
| Troy | Baseball | USA | male |
| Troy Williamson | Fighting | International | mixed |
| Troyes | Soccer | France | male |
| Truro City | Soccer | England | male |
| TSG 1899 Hoffenheim | Soccer | Germany | male |
| Tuco Tokkos | Fighting | International | mixed |
| Tucson Roadrunners | Ice Hockey | USA | male |
| Tulane | Football | USA | male |
| Tulsa | Football | USA | male |
| Tulsa | Basketball | USA | male |
| Tulsa Oilers | Ice Hockey | USA | male |
| Tunisia | Soccer | International | male |
| Tunisia | Basketball | International | male |
| Türkiye | Soccer | International | male |
| Turkiye | Basketball | International | female |
| Turkiye | Basketball | International | male |
| Turkiye U17 | Basketball | International | male |
| Turks & Caicos Islands | Soccer | International | female |
| Tuskegee | Football | USA | male |
| Ty Cole Miller | Fighting | International | mixed |
| Tyler Denny | Fighting | International | mixed |
| Tyrell Fortune | Fighting | International | mixed |
| UAB | Football | USA | male |
| UC Santa Barbara | Baseball | USA | male |
| UCF | Football | USA | male |
| UCLA | Basketball | USA | female |
| UCLA | Basketball | USA | male |
| UCLA | Football | USA | male |
| UConn | Ice Hockey | USA | female |
| UConn | Basketball | USA | female |
| UConn | Basketball | USA | male |
| UCV | Soccer | Venezuela | male |
| Udinese | Soccer | Italy | male |
| Uganda | Basketball | International | male |
| Uganda U17 | Soccer | International | male |
| Ukraine | Basketball | International | male |
| Ukraine | Soccer | International | male |
| Umar Nurmagomedov | Fighting | International | mixed |
| UMass Amherst | Football | USA | male |
| UMECIT | Soccer | Panama | male |
| União de Leiria | Soccer | Portugal | male |
| Unicaja | Basketball | Spain | male |
| Union Berlin | Soccer | Germany | male |
| Union Berlin | Soccer | International | female |
| Union Saint-Gilloise | Soccer | Belgium | male |
| United States | Soccer | International | male |
| United States | Soccer | International | female |
| United States U20 | Soccer | International | female |
| United States U20 | Soccer | International | male |
| United States Virgin Islands U20 | Soccer | International | male |
| Universidad Católica | Soccer | Ecuador | male |
| Universidad Católica | Soccer | Chile | male |
| Universidad O&M | Soccer | Dominican Republic | male |
| Universitario | Soccer | Peru | male |
| University of Georgia | Football | USA | male |
| University of Georgia | Baseball | USA | male |
| University of Georgia | Basketball | USA | male |
| UNLV | Basketball | USA | male |
| UNLV | Football | USA | male |
| Uros Medic | Fighting | International | mixed |
| Uruguay | Soccer | International | male |
| Uruguay | Basketball | International | male |
| USA | Ice Hockey | International | female |
| USA | Ice Hockey | International | male |
| USA | Baseball | International | male |
| USA | Basketball | International | female |
| USA | Basketball | International | male |
| USA U18 | Ice Hockey | USA | male |
| USA U18 | Ice Hockey | International | female |
| USA U19 | Soccer | International | female |
| USA U20 | Ice Hockey | International | male |
| USM Alger | Soccer | Algeria | male |
| Utah | Football | USA | male |
| Utah | Basketball | USA | male |
| Utah Grizzlies | Ice Hockey | USA | male |
| Utah Jazz | Basketball | USA | male |
| Utah Mammoth | Ice Hockey | USA | male |
| Utah Royals | Soccer | USA | female |
| Utah State | Football | USA | male |
| UTEP | Football | USA | male |
| Utica Comets | Ice Hockey | USA | male |
| UTSA | Football | USA | male |
| Uzbekistan | Soccer | International | male |
| Val-D'Or Foreurs | Ice Hockey | Canada | male |
| Valencia | Soccer | Spain | male |
| Valencia | Basketball | Spain | male |
| Valentin Vacherot | Tennis | International | mixed |
| Valesca Machado | Fighting | International | mixed |
| Valter Walker | Fighting | International | mixed |
| Vancouver Bandits | Basketball | Canada | male |
| Vancouver Canucks | Ice Hockey | USA | male |
| Vancouver FC | Soccer | Canada | male |
| Vancouver Goldeneyes | Ice Hockey | USA | female |
| Vancouver Rise | Soccer | Canada | female |
| Vancouver Whitecaps | Soccer | USA | male |
| Vanderbilt | Basketball | USA | female |
| Vanderbilt | Basketball | USA | male |
| Vanderbilt | Baseball | USA | male |
| Vanderbilt | Football | USA | male |
| Vanessa Demopoulos | Fighting | International | mixed |
| Vasco da Gama | Soccer | Brazil | male |
| Växjö Lakers | Ice Hockey | Sweden | male |
| VCU | Basketball | USA | male |
| Vegas Golden Knights | Ice Hockey | USA | male |
| Venezia | Soccer | Italy | male |
| Venezuela | Baseball | International | male |
| Venezuela | Basketball | International | male |
| Venezuela | Soccer | International | male |
| Verdes | Soccer | Belize | male |
| Verl | Soccer | Germany | male |
| Veronica Hardy | Fighting | Venezuela | mixed |
| VfB Stuttgart | Soccer | Germany | male |
| VfL Bochum | Soccer | Germany | male |
| Vfl Wolfsburg | Soccer | Germany | female |
| Vicente Luque | Fighting | Brazil | mixed |
| Victor Valenzuela | Fighting | International | mixed |
| Victoriaville Tigres | Ice Hockey | Canada | male |
| Vietnam | Soccer | International | male |
| Viking | Soccer | Norway | male |
| Viktoria Plzeň | Soccer | Czech Republic | male |
| Villanova | Basketball | USA | male |
| Villarreal | Soccer | Spain | male |
| Villarreal U19 | Soccer | International | male |
| Ville de Dakar (Sen) | Basketball | International | male |
| Vince Morales | Fighting | International | mixed |
| Vinicius Oliveira | Fighting | International | mixed |
| Virginia | Football | USA | male |
| Virginia | Baseball | USA | male |
| Virginia | Basketball | USA | male |
| Virginia | Basketball | USA | female |
| Virginia Tech | Football | USA | male |
| Virginia Tech | Basketball | USA | male |
| Virna Jandiroba | Fighting | International | mixed |
| Virtus Entella | Soccer | Italy | male |
| Vitor Petrino | Fighting | International | mixed |
| Vitoria Guimaraes | Soccer | Portugal | male |
| Vlastislav Cepo | Fighting | International | mixed |
| Volos NFC | Soccer | Greece | male |
| Wagner | Basketball | USA | male |
| Wake Forest | Football | USA | male |
| Wake Forest | Basketball | USA | male |
| Waldo Cortes-Acosta | Fighting | International | mixed |
| Wales | Soccer | International | male |
| Walsall | Soccer | England | male |
| Walton & Hersham | Soccer | England | male |
| Washington | Basketball | USA | female |
| Washington | Basketball | USA | male |
| Washington | Football | USA | male |
| Washington Capitals | Ice Hockey | USA | male |
| Washington Commanders | Football | USA | male |
| Washington Mystics | Basketball | USA | female |
| Washington Nationals | Baseball | USA | male |
| Washington Spirit | Soccer | USA | female |
| Washington State | Football | USA | male |
| Washington Wizards | Basketball | USA | male |
| Waterloo Black Hawks | Ice Hockey | USA | male |
| Watford | Soccer | England | male |
| Wealdstone | Soccer | England | male |
| Wehen Wiesbaden | Soccer | Germany | male |
| Wellington Turman | Fighting | International | mixed |
| Werder Bremen | Soccer | Germany | male |
| Werder Bremen | Soccer | Germany | female |
| Wesley Schultz | Fighting | International | mixed |
| West Alabama | Football | USA | male |
| West Bromwich Albion | Soccer | England | male |
| West Ham United | Soccer | England | male |
| West Ham United | Soccer | England | female |
| West Virginia | Baseball | USA | male |
| West Virginia | Basketball | USA | male |
| West Virginia | Football | USA | male |
| Westchester Knicks | Basketball | USA | male |
| Western Illinois | Football | USA | male |
| Western Kentucky | Football | USA | male |
| Western Michigan | Ice Hockey | USA | male |
| Western Michigan | Football | USA | male |
| Weston-super-Mare | Soccer | England | male |
| Wichita Thunder | Ice Hockey | USA | male |
| Widzew Łódź | Soccer | Poland | male |
| Wieczysta Kraków | Soccer | International | male |
| Wigan Athletic | Soccer | England | male |
| Wilkens Mathieu | Fighting | International | mixed |
| Wilkes-Barre/Scranton | Ice Hockey | USA | male |
| Willem II | Soccer | Netherlands | male |
| William Gomis | Fighting | International | mixed |
| Windsor Spitfires | Ice Hockey | Canada | male |
| Windy City Bulls | Basketball | USA | male |
| Winnipeg Blue Bombers | Football | Canada | male |
| Winnipeg Jets | Ice Hockey | Canada | male |
| Winnipeg Sea Bears | Basketball | Canada | male |
| Wisconsin | Basketball | USA | female |
| Wisconsin | Basketball | USA | male |
| Wisconsin | Football | USA | male |
| Wisconsin | Ice Hockey | USA | male |
| Wisconsin | Ice Hockey | USA | female |
| Wisconsin Herd | Basketball | USA | male |
| Wisła Kraków | Soccer | Poland | male |
| Wisła Płock | Soccer | Poland | male |
| Woking | Soccer | England | male |
| Wolfsburg | Soccer | Germany | male |
| Wolverhampton Wanderers | Soccer | England | male |
| Woodbridge Strikers | Soccer | Canada | male |
| Worksop Town | Soccer | England | male |
| Worthing | Soccer | England | male |
| Wrexham | Soccer | Wales | male |
| Würzburg | Basketball | Germany | male |
| Wycombe Wanderers | Soccer | England | male |
| Wyoming | Football | USA | male |
| Xavier | Basketball | USA | male |
| Xelajú | Soccer | Guatemala | male |
| Xiao Long | Fighting | International | mixed |
| Yadier Del Valle | Fighting | International | mixed |
| Yadong Song | Fighting | International | mixed |
| Yan Xiaonan | Fighting | China | mixed |
| Yana Santos | Fighting | International | mixed |
| Yaroslav Amosov | Fighting | International | mixed |
| Yazmin Jauregui | Fighting | International | mixed |
| Yeovil Town | Soccer | England | male |
| Yi Zha | Fighting | International | mixed |
| Yi-Sak Lee | Fighting | International | mixed |
| York City | Soccer | England | male |
| Young Africans | Soccer | Tanzania | male |
| Young Boys | Soccer | Switzerland | male |
| Youngstown Phantoms | Ice Hockey | USA | male |
| Yousri Belgaroui | Fighting | International | mixed |
| Youssef Zalal | Fighting | Morocco | mixed |
| Yuneisy Duben | Fighting | International | mixed |
| Zachary Reese | Fighting | International | mixed |
| Zagłębie Lubin | Soccer | Poland | male |
| Zamalek | Soccer | Egypt | male |
| Zambia | Soccer | International | female |
| Zhang Mingyang | Fighting | International | mixed |
| Zimbabwe | Soccer | International | male |
| Zrinjski | Soccer | Bosnia & Herzegovina | male |
| Zug | Ice Hockey | Switzerland | male |
| Zulte-Waregem | Soccer | Belgium | male |
.