| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Hashem | Arkhagha | 6' 2" | 185 lbs. | 75.0" | Orthodox | 6 | 1 | 0 | ||
| Andrei | Arlovski | The Pitbull | 6' 3" | 240 lbs. | 77.0" | Orthodox | 34 | 24 | 0 | |
| Garrett | Armfield | 5' 6" | 135 lbs. | 70.0" | Orthodox | 10 | 5 | 0 | ||
| Joey | Armstrong | -- | -- | -- | 5 | 2 | 0 | |||
| Austin | Arnett | 6' 0" | 145 lbs. | 72.0" | Orthodox | 16 | 6 | 0 | ||
| Ricardo | Arona | The Brazilian Tiger | 5' 11" | 205 lbs. | -- | Orthodox | 14 | 5 | 0 | |
| Eli | Aronov | The Israeli Tank | 5' 10" | 185 lbs. | 72.0" | Orthodox | 6 | 1 | 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 | 11 | 1 | |
| Matt | Arroyo | No Regard | 5' 10" | 170 lbs. | 72.0" | Orthodox | 3 | 3 | 0 | |
| Antonio | Arroyo | 6' 3" | 185 lbs. | 73.0" | Orthodox | 9 | 5 | 0 | ||
| Gilles | Arsene | 5' 9" | 190 lbs. | -- | Southpaw | 1 | 1 | 0 | ||
| Veta | Arteaga | 5' 7" | 125 lbs. | -- | 3 | 1 | 0 | |||
| Cesar | Arzamendia | Goku | 5' 11" | 155 lbs. | -- | Orthodox | 8 | 3 | 0 | |
| Kai | Asakura | 5' 8" | 125 lbs. | 69.0" | Orthodox | 21 | 5 | 0 | ||
| Teddy | Ash | Bear | 6' 1" | 185 lbs. | 73.0" | Switch | 14 | 5 | 0 | |
| Arman | Ashimov | Mustafa Ozturik | 5' 6" | 125 lbs. | -- | 11 | 3 | 1 | ||
| Yanal | Ashmouz | Red Fox | 5' 9" | 155 lbs. | 69.0" | Orthodox | 8 | 1 | 0 | |
| Asjabharan | 5' 6" | 135 lbs. | -- | 7 | 6 | 0 | ||||
| Askar | Askar | AK-47 | 5' 7" | 145 lbs. | 69.0" | Orthodox | 11 | 1 | 0 | |
| Askar | Askarov | Bullet | 5' 6" | 125 lbs. | 67.0" | Orthodox | 14 | 1 | 1 | |
| Cyril | Asker | Silverback | 6' 0" | 247 lbs. | 74.0" | Orthodox | 9 | 4 | 0 | |
| Khusein | Askhabov | Nohcho | 5' 8" | 145 lbs. | 69.0" | Orthodox | 23 | 1 | 0 | |
| Scott | Askham | 6' 3" | 185 lbs. | 75.0" | Southpaw | 14 | 4 | 0 |