- A-League All Stars Men (Football)
- A-League All Stars Women (Football)
- A. Académica (Football)
- AaB (Football)
- Aalesund (Football)
- Aaron Chalmers (Boxing)
- Abahani Limited (Cricket)
- Abbottabad Region (Cricket)
- Aberdeen (Football)
- Aberdeen Women (Football)
- Abha (Football)
- Abilene Christian (American Football)
- Abilene Christian (Basketball)
- Abingdon Town Women (Football)
- Abingdon United Women (Football)
- Abraham Nova (Boxing)
- Abu Dhabi (Cricket)
- Abu Dhabi Knight Riders (Cricket)
- AC Ajaccio (Football)
- AC Horsens (Football)
- AC Milan (Football)
- AC Oulu (Football)
- AC Virtus (Football)
- Ac. Viseu (Football)
- Accrington Stanley (Football)
- Accrington Stanley Women (Football)
- Ace Capital Cricket Club (Cricket)
- ACT (Cricket)
- Actonians LFC (Football)
- AD San Carlos (Football)
- Adam Azim (Boxing)
- Adam Deines (Boxing)
- Adana Demirspor (Football)
- Adanaspor (Football)
- Adelaide 36ers (Basketball)
- Adelaide Crows (Australian Rules Football)
- Adelaide Lightning (Basketball)
- Adelaide Olympic FC (Football)
- Adelaide Rush (Ice Hockey)
- Adelaide Strikers (Cricket)
- Adelaide Strikers Women (Cricket)
- Adelaide United (Football)
- ADO Den Haag (Football)
- Adrian Estrella (Boxing)
- Adrian Granados (Boxing)
- Adrien Broner (Boxing)
- AEK Athens (Football)
- AEK Larnaca (Football)
- AEL (Football)
- AFC (American Football)
- AFC Bournemouth (Football)
- AFC Eskilstuna (Football)
- AFC Fylde (Football)
- AFC Portchester Ladies (Football)
- AFC Stoneham Ladies (Football)
- AFC Sudbury (Football)
- AFC Sudbury Women (Football)
- AFC Telford United Women (Football)
- AFC Toronto (Football)
- AFC Whyteleafe (Football)
- AFC Wimbledon (Football)
- AFC Wimbledon Women (Football)
- Afghanistan (Cricket)
- Afghanistan (Football)
- Afghanistan A (Cricket)
- Afghanistan Under-19s (Cricket)
- Afghanistan XI (Cricket)
- Agen (Rugby Union)
- AGF (Football)
- Agrani Bank Cricket Club (Cricket)
- Aidos Yerbossynuly (Boxing)
- AIK (Football)
- Air Force (American Football)
- Airdrie Ladies (Football)
- Airdrieonians (Football)
- Ajax (Football)
- Ajax Vrouwen (Football)
- Ajman (Cricket)
- Ajman Bolts (Cricket)
- Akademija Pandev (Football)
- Akeem Ennis-Brown (Boxing)
- Akhisar Belediyespor (Football)
- Akron (American Football)
- Akron (Basketball)
- Al Ahly (Football)
- Al Jazira (Football)
- Al Sadd (Football)
- AL Wild Card Winner (Baseball)
- Al-Adalah (Football)
- Al-Ahli (Football)
- Al-Ain (Football)
- Al-Arabi (Football)
- Al-Batin (Football)
- Al-Bukiryah (Football)
- Al-Ettifaq (Football)
- Al-Faisaly (Football)
- Al-Fateh (Football)
- Al-Fayha (Football)
- Al-Hazem (Football)
- Al-Hilal (Football)
- Al-Ittihad (Football)
- Al-Jabalain (Football)
- Al-Jandal (Football)
- Al-Khaleej (Football)
- Al-Kholood (Football)
- Al-Najma (Football)
- Al-Nassr (Football)
- Al-Okhdood (Football)
- Al-Orobah (Football)
- Al-Qadsiah (Football)
- Al-Raed (Football)
- Al-Riyadh (Football)
- Al-Sadd Sports Club (Football)
- Al-Safa (Football)
- Al-Shabab (Football)
- Al-Taawoun (Football)
- Al-Tai (Football)
- Al-Wehda (Football)
- Alabama (American Football)
- Alabama (Basketball)
- Alabama A&M (American Football)
- Alabama State (American Football)
- Alanyaspor (Football)
- Alashkert FC (Football)
- Alaves (Football)
- ALBA Berlin (Basketball)
- Albania (Football)
- Albania U21 (Football)
- Albania Women (Football)
- Albany (American Football)
- Albany (Basketball)
- Alberto Machado (Boxing)
- Alberto Puello (Boxing)
- Albion Rovers (Football)
- Alcorn State (American Football)
- Aldershot Town (Football)
- Alen Babić (Boxing)
- Alex Dilmaghani (Boxing)
- Alex Saucedo (Boxing)
- Alex Theran (Boxing)
- Alex Wassabi (Boxing)
- Alexander Flores (Boxing)
- Alexander Povetkin (Boxing)
- Alexandro Santiago (Boxing)
- Alexandru Jur (Boxing)
- Alexey Egorov (Boxing)
- Alfalah University Men (Cricket)
- Alfonso Lopez (Boxing)
- Alfreton Town (Football)
- Algeria (Football)
- Algeria (Handball)
- Algeria (Volleyball)
- All Blacks XV (Rugby Union)
- Alloa Athletic (Football)
- Almere City FC (Football)
- Almeria (Football)
- Alnwick Town Juniors LFC (Football)
- Altay (Football)
- Altrincham (Football)
- Alvechurch (Football)
- Alycia Baumgardner (Boxing)
- Amanda Serrano (Boxing)
- Amatori & Calvisano (Rugby Union)
- Amazons (Cricket)
- American League (Baseball)
- American Samoa (Football)
- American Team (American Football)
- American University (Basketball)
- Amiens (Football)
- Amir Khan (Boxing)
- Amnat Ruenroeng (Boxing)
- Ampthill (Rugby Union)
- Amsterdam Kings (Cricket)
- Anadolu Efes Spor Kulübü (Basketball)
- Anaheim Ducks (Ice Hockey)
- Anahi Sanchez (Boxing)
- Anauel Ngamissengue (Boxing)
- Anderlecht (Football)
- Anderson Silva (Boxing)
- Andhra (Cricket)
- Andhra Women (Cricket)
- Andorra (Football)
- Andorra U21 (Football)
- Andorra Women (Football)
- Andre August (Boxing)
- Andreas Katzourakis (Boxing)
- Andrei Mikhailovich (Boxing)
- Andres Campos (Boxing)
- Andrew Cancio (Boxing)
- Andrew Francillette (Boxing)
- Andrew Moloney (Boxing)
- Andrew Robinson (Boxing)
- Andriy Rudenko (Boxing)
- Andy Ruiz Jr (Boxing)
- Andy Townend (Boxing)
- AnEsonGib (Boxing)
- Angel City FC (Football)
- Angel Moreno (Boxing)
- Angelo Leo (Boxing)
- Angers (Football)
- Angola (Football)
- Angola (Basketball)
- Anguilla (Football)
- Ankaragücü (Football)
- Annan Athletic (Football)
- Annecy (Football)
- Anorthosis Famagusta (Football)
- Antalyaspor (Football)
- Anthem RC (Rugby Union)
- Anthony Cacace (Boxing)
- Anthony Dirrell (Boxing)
- Anthony Fowler (Boxing)
- Anthony Joshua (Boxing)
- Anthony Smith (Mixed Martial Arts)
- Anthony Taylor (Boxing)
- Anthony Yarde (Boxing)
- Antigua & Barbuda (Netball)
- Antigua and Barbuda (Football)
- Antigua and Barbuda Falcons (Cricket)
- Antrim (Hurling)
- Antrim (Gaelic Football)
- ANZAC Barbarians (Cricket)
- ANZAC Barbarians Women (Cricket)
- APIA Leichhardt FC (Football)
- Apinun Khongsong (Boxing)
- Apoel Nicosia (Football)
- Apollon Limassol (Football)
- Apollon Smyrnis (Football)
- Appalachian State (American Football)
- Appalachian State (Basketball)
- Aran Dipaen (Boxing)
- Ararat Yerevan (Football)
- Ararat-Armenia (Football)
- Arbroath (Football)
- Archie Sharp (Boxing)
- Arely Mucino (Boxing)
- Argentina (Football)
- Argentina (Rugby Union)
- Argentina (Tennis)
- Argentina (Basketball)
- Argentina (Volleyball)
- Argentina (Hockey)
- Argentina (Handball)
- Argentina U20 (Rugby Union)
- Argentina Women (Football)
- Argentina Women (Lacrosse)
- Argentina Women (Hockey)
- Argentina Women (Volleyball)
- Argentina XV (Rugby Union)
- Aris Limassol (Football)
- Aris Thessaloniki (Football)
- Arizona (American Football)
- Arizona (Basketball)
- Arizona Cardinals (American Football)
- Arizona Coyotes (Ice Hockey)
- Arizona Diamondbacks (Baseball)
- Arizona State (American Football)
- Arizona State (Basketball)
- Arkansas (American Football)
- Arkansas (Basketball)
- Arkansas Pine Bluff (American Football)
- Arkansas State (American Football)
- Arkansas State (Basketball)
- Arlington Renegades (American Football)
- Armagh (Hurling)
- Armagh (Gaelic Football)
- Armed Police Force Club (Cricket)
- Armenia (Football)
- Armenia U21 (Football)
- Armenia Women (Football)
- Arminia Bielefeld (Football)
- Army Masters (Rugby Union)
- Army Men (Rugby Union)
- Army West Point (American Football)
- Army Women (Rugby Union)
- Arnold Barboza Jr. (Boxing)
- Arsen Goulamirian (Boxing)
- Arsenal (Football)
- Arsenal U21 (Football)
- Arsenal Women (Football)
- Artur Beterbiev (Boxing)
- Aruba (Football)
- Arunachal Pradesh (Cricket)
- AS Monaco Basket (Basketball)
- AS Pirae (Football)
- Ascot United (Football)
- Ascot United Ladies (Football)
- Asfordby Ladies (Football)
- Ashford Town (Middlesex) FC Women (Football)
- Ashford Town (Middlesex) Ladies (Football)
- Ashford United Ladies (Football)
- Ashley Lane (Boxing)
- Ashley Theophane (Boxing)
- Asia Lions (Cricket)
- Asia XI (Cricket)
- ASM Clermont Auvergne (Rugby Union)
- Aspley (Australian Rules Football)
- Assam (Cricket)
- Assam Women (Cricket)
- Astana (Football)
- Asteras Tripolis (Football)
- Aston Villa (Football)
- Aston Villa U21 (Football)
- Aston Villa Women (Football)
- ASVEL Basket (Basketball)
- Atalanta (Football)
- Athens Kallithea (Football)
- Athletic Bilbao (Football)
- Athletico Paranaense (Football)
- Athletics (Baseball)
- Atlanta Braves (Baseball)
- Atlanta Dream (Basketball)
- Atlanta Drive GC (Golf)
- Atlanta Falcons (American Football)
- Atlanta Fire (Cricket)
- Atlanta Hawks (Basketball)
- Atlanta Riders (Cricket)
- Atlanta United FC (Football)
- Atlas F.C. (Football)
- Atlètic Club d'Escaldes (Football)
- Atlético de Madrid Femenino (Football)
- Atlético de San Luis (Football)
- Atlético Madrid (Football)
- Atlético Mineiro (Football)
- Atlético Nacional (Football)
- Atlético Ottawa (Football)
- Atromitos Athens (Football)
- ATSV Wolfsberg (Football)
- Auburn (Basketball)
- Auburn (American Football)
- Auchinleck Talbot (Football)
- Auckland (Rugby Union)
- Auckland (Cricket)
- Auckland City (Football)
- Auckland FC (Football)
- Auckland Storm (Rugby Union)
- Auckland Women (Cricket)
- Aurillac (Rugby Union)
- Austin FC (Football)
- Austin Gilgronis (Rugby Union)
- Austin McBroom (Boxing)
- Austin Peay (American Football)
- Australia (Cricket)
- Australia (Tennis)
- Australia (Netball)
- Australia (Football)
- Australia (Rugby Union)
- Australia (Basketball)
- Australia (Rugby League)
- Australia (Hockey)
- Australia (Baseball)
- Australia (Volleyball)
- Australia A (Cricket)
- Australia A (Rugby Union)
- Australia A Women (Cricket)
- Australia Champions (Cricket)
- Australia Legends (Cricket)
- Australia Masters (Cricket)
- Australia U20 (Rugby Union)
- Australia Under-19s (Cricket)
- Australia Women (Cricket)
- Australia Women (Football)
- Australia Women (Rugby Union)
- Australia Women (Basketball)
- Australia Women (Lacrosse)
- Australia Women (Hockey)
- Australia Women Under-19s (Cricket)
- Australian Capital Territory Women (Cricket)
- Australian Cricket Board Chairman's XI (Cricket)
- Australian Indigenous All-Stars (Rugby League)
- Australian Jillaroos (Rugby League)
- Austria (Football)
- Austria (Tennis)
- Austria (Ice Hockey)
- Austria (Handball)
- Austria (Cricket)
- Austria U21 (Football)
- Austria Women (Football)
- Austria Women (Lacrosse)
- Auxerre (Football)
- AV Alta FC (Football)
- Avni Yildirim (Boxing)
- AVS Futebol SAD (Football)
- Aylesford Ladies (Football)
- Ayr United (Football)
- Ayr United Women (Football)
- AZ Alkmaar (Football)
- Azad Jammu & Kashmir Region (Cricket)
- Azerbaijan (Football)
- Azerbaijan U21 (Football)
- Azerbaijan Women (Football)