A
- Tank Abbott – (Cage Rage, EliteXC, Pride, Strikeforce, UFC)
- Hiroyuki Abe – (Shooto)
- Cyril Abidi – (K-1)
- Daniel Acacio – (Pride)
- Bernard Ackah – (DEEP, Hero's)
- Yoshihiro Akiyama – (Hero's, UFC)
- Gilbert Aldana – (UFC)
- José Aldo – (Jungle Fight Championship, Pancrase, WEC), (UFC)
- John Alessio – (Dream, KOTC, Pancrase, PRIDE, UFC, WEC)
- Houston Alexander – (Adrenaline MMA, UFC)
- Ricardo Almeida – (Pancrase, PRIDE, UFC)
- Eddie Alvarez – (Bellator, bodogFight, DREAM, MFC)
- Thiago Alves – (KOTC, UFC)
- Andre Amade – (DREAM, Hero's)
- Dean Amasinger – (Cage Warriors, KSW)
- Jimmy Ambriz – (KOTC, Pancrase, WEC)
- Alex Andrade – (KOTC, Pancrase, PRIDE, UFC)
- Yoji Anjo – (PRIDE, UFC)
- Shinya Aoki – (DEEP, DREAM, PRIDE, Shooto)
- Andrei Arlovski – (Affliction, M-1, Strikeforce, UFC)
- Ricardo Arona – (PRIDE)
- Noboru Asahi – (DEEP, Shooto)
- Rich Attonito – (UFC)
- Marcus Aurelio – (KOTC, PRIDE, UFC)
- Mikhail Avetisyan – (IFC)
- Luiz Azeredo – (Cage Rage, PRIDE, Shooto)
- Luciano Azevedo – (PRIDE, Shooto)
Read more about this topic: List Of Male Mixed Martial Artists