| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Junior | Albini | Baby | 6' 3" | 264 lbs. | 74.0" | Orthodox | 14 | 6 | 0 | |
| Wes | Albritton | 5' 10" | 188 lbs. | -- | Orthodox | 0 | 1 | 0 | ||
| Aleksandra | Albu | Stitch | 5' 2" | 115 lbs. | 63.0" | Orthodox | 3 | 2 | 0 | |
| Israel | Albuquerque | -- | 185 lbs. | -- | Orthodox | 0 | 3 | 0 | ||
| Juan | Alcain | -- | -- | -- | 1 | 2 | 0 | |||
| Iuri | Alcantara | Marajo | 5' 9" | 135 lbs. | 71.0" | Southpaw | 35 | 10 | 0 | |
| Ildemar | Alcantara | Marajo | 6' 2" | 185 lbs. | 78.0" | Orthodox | 21 | 11 | 0 | |
| Alfonso | Alcarez | 5' 3" | 145 lbs. | -- | 1 | 3 | 1 | |||
| Gilbert | Aldana | El Peligro | 6' 1" | 250 lbs. | -- | Orthodox | 6 | 2 | 0 | |
| Irene | Aldana | 5' 9" | 135 lbs. | 68.0" | Orthodox | 15 | 8 | 0 | ||
| Hector | Aldana | 5' 11" | 170 lbs. | 72.0" | Orthodox | 4 | 3 | 0 | ||
| Jose | Alday | Pochito | 5' 7" | 135 lbs. | 68.0" | Orthodox | 14 | 6 | 1 | |
| Jose | Aldo | 5' 7" | 135 lbs. | 70.0" | Orthodox | 32 | 10 | 0 | ||
| JJ | Aldrich | 5' 5" | 125 lbs. | 67.0" | Southpaw | 14 | 7 | 0 | ||
| Irina | Alekseeva | Russian Ronda | 5' 8" | 135 lbs. | 67.0" | Orthodox | 5 | 3 | 0 | |
| Talita | Alencar | Problem Child | 5' 1" | 115 lbs. | 58.0" | Orthodox | 6 | 1 | 1 | |
| Jim | Alers | The Beast | 5' 9" | 145 lbs. | 71.0" | Orthodox | 13 | 3 | 0 | |
| John | Alessio | The Natural | 5' 10" | 155 lbs. | 72.0" | Orthodox | 35 | 17 | 0 | |
| 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 | |
| Lucas | Alexander | The Lion | 5' 11" | 145 lbs. | 73.0" | Orthodox | 8 | 5 | 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 |