| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Houston | Alexander | The Assassin | 6' 0" | 205 lbs. | 72.0" | Orthodox | 17 | 15 | 1 | |
| Kenneth | Alexander | The Machine | 5' 9" | 155 lbs. | -- | Orthodox | 7 | 6 | 0 | |
| Marcio | Alexandre Junior | Lyoto | 6' 0" | 185 lbs. | 75.0" | Southpaw | 17 | 4 | 0 | |
| Olaf | Alfonso | 6' 2" | 170 lbs. | -- | Orthodox | 8 | 12 | 0 | ||
| Pablo | Alfonso | The Hurricane | 5' 8" | 145 lbs. | -- | 9 | 7 | 0 | ||
| Levi | Alford | -- | -- | -- | 1 | 7 | 0 | |||
| Bill | Algeo | Honey Badger | 6' 0" | 145 lbs. | 73.0" | Switch | 11 | 4 | 0 | |
| Royce | Alger | 5' 10" | 199 lbs. | -- | Orthodox | 3 | 2 | 0 | ||
| Amir | Aliakbari | 6' 3" | 250 lbs. | -- | 10 | 1 | 0 | |||
| Sultan | Aliev | 5' 11" | 170 lbs. | 74.0" | Orthodox | 15 | 3 | 0 | ||
| John | Allan | 6' 3" | 205 lbs. | 75.0" | Orthodox | 13 | 5 | 0 | ||
| George | Allen | 6' 2" | 205 lbs. | -- | Open Stance | 13 | 19 | 2 | ||
| Arnold | Allen | Almighty | 5' 8" | 145 lbs. | 70.0" | Southpaw | 16 | 1 | 0 | |
| Brendan | Allen | All In | 6' 2" | 185 lbs. | 75.0" | Orthodox | 15 | 3 | 0 | |
| Ben | Alloway | Blanco | 5' 11" | 170 lbs. | 76.0" | Orthodox | 18 | 8 | 0 | |
| Ricardo | Almeida | Big Dog | 6' 0" | 170 lbs. | 74.0" | Orthodox | 13 | 5 | 0 | |
| Magno | Almeida | 6' 0" | 155 lbs. | -- | 10 | 3 | 0 | |||
| Thomas | Almeida | Thominhas | 5' 7" | 135 lbs. | 70.0" | Southpaw | 22 | 3 | 0 | |
| Ericka | Almeida | 5' 6" | 115 lbs. | -- | Orthodox | 7 | 3 | 0 | ||
| Estefani | Almeida | 5' 4" | 125 lbs. | -- | Orthodox | 7 | 3 | 0 | ||
| Mauricio | Alonso | 6' 2" | 170 lbs. | -- | 13 | 7 | 0 | |||
| Sarah | Alpar | Too Sweet | 5' 4" | 135 lbs. | -- | Southpaw | 8 | 4 | 0 | |
| Rico | Altamirano | 5' 10" | 170 lbs. | -- | 4 | 3 | 0 | |||
| Mike | Altman | 5' 10" | 185 lbs. | -- | Orthodox | 1 | 4 | 0 |