| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Gadzhimurad | Antigulov | 5' 11" | 205 lbs. | 70.0" | Orthodox | 20 | 6 | 0 | ||
| Adam | Antolin | Captain Chaos | 5' 5" | 125 lbs. | 63.0" | Orthodox | 12 | 3 | 0 | |
| Angelo | Antonio | -- | 205 lbs. | -- | Orthodox | 1 | 3 | 0 | ||
| Zu | Anyanwu | 8th Wonder | 6' 1" | 251 lbs. | 77.0" | Orthodox | 14 | 5 | 0 | |
| Shinsho | Anzai | Animal | 5' 7" | 170 lbs. | 70.0" | Orthodox | 10 | 3 | 0 | |
| Shinya | Aoki | Tobikan Judan | 5' 11" | 154 lbs. | -- | Southpaw | 30 | 5 | 0 | |
| Josh | Appelt | The Juggernaut | 5' 10" | 255 lbs. | 73.0" | Southpaw | 15 | 6 | 0 | |
| Erik | Apple | 6' 0" | 170 lbs. | -- | Orthodox | 10 | 3 | 0 | ||
| Kenji | Arai | 5' 10" | 145 lbs. | -- | Southpaw | 15 | 15 | 5 | ||
| Romie | Aram | 5' 10" | 170 lbs. | -- | Orthodox | 7 | 1 | 0 | ||
| Felipe | Arantes | Sertanejo | 5' 8" | 135 lbs. | 73.0" | Orthodox | 18 | 10 | 1 | |
| Igor | Araujo | 6' 1" | 170 lbs. | 77.0" | Orthodox | 25 | 8 | 0 | ||
| Julio | Arce | 5' 7" | 145 lbs. | 70.0" | Southpaw | 15 | 3 | 0 | ||
| Art | Arciniega | King Arthur | 5' 8" | 145 lbs. | -- | 15 | 7 | 0 | ||
| Tristan | Arenal | -- | 155 lbs. | -- | 4 | 1 | 0 | |||
| Andrei | Arlovski | The Pitbull | 6' 3" | 240 lbs. | 77.0" | Orthodox | 27 | 17 | 0 | |
| Joey | Armstrong | -- | -- | -- | 5 | 2 | 0 | |||
| Austin | Arnett | Golden Boy | 6' 0" | 145 lbs. | 72.0" | Orthodox | 16 | 6 | 0 | |
| Ricardo | Arona | The Brazilian Tiger | 5' 11" | 205 lbs. | -- | Orthodox | 14 | 5 | 0 | |
| Chalid | Arrab | Die Faust | 5' 11" | 205 lbs. | -- | Orthodox | 7 | 3 | 0 | |
| Akbarh | Arreola | El Caballero | 5' 10" | 155 lbs. | 71.0" | Southpaw | 23 | 10 | 1 | |
| Matt | Arroyo | No Regard | 5' 10" | 170 lbs. | 72.0" | Orthodox | 3 | 3 | 0 | |
| Antonio | Arroyo | 6' 2" | 185 lbs. | -- | Orthodox | 8 | 2 | 0 | ||
| Gilles | Arsene | 5' 9" | 190 lbs. | -- | Southpaw | 1 | 1 | 0 |