| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Gabriel | Bonfim | Marretinha | 6' 1" | 170 lbs. | 72.0" | Orthodox | 18 | 1 | 0 | |
| Ismael | Bonfim | Marreta | 5' 8" | 155 lbs. | 71.0" | Orthodox | 20 | 5 | 0 | |
| Jesse | Bongfeldt | Water | 6' 0" | 185 lbs. | -- | Orthodox | 16 | 5 | 1 | |
| Marcos | Bonilla | Murder Marx | 5' 10" | 145 lbs. | -- | 4 | 4 | 0 | ||
| Stephan | Bonnar | The American Psycho | 6' 4" | 205 lbs. | 79.0" | Orthodox | 15 | 9 | 0 | |
| Rogerio | Bontorin | 5' 5" | 125 lbs. | 67.0" | Orthodox | 16 | 4 | 0 | ||
| Ray | Borg | The Tazmexican Devil | 5' 4" | 135 lbs. | 63.0" | Orthodox | 13 | 5 | 0 | |
| Igor | Borisov | 6' 0" | 235 lbs. | -- | Orthodox | 1 | 1 | 0 | ||
| Kevin | Borjas | El Gallo Negro | 5' 5" | 125 lbs. | 68.0" | Orthodox | 10 | 4 | 0 | |
| Calen | Born | 5' 8" | 170 lbs. | 72.0" | Switch | 7 | 1 | 0 | ||
| Caio | Borralho | The Natural | 6' 1" | 185 lbs. | 75.0" | Southpaw | 17 | 2 | 0 | |
| Zachary | Borrego | The Dragon | 6' 2" | 185 lbs. | 78.0" | Switch | 3 | 1 | 0 | |
| Viacheslav | Borshchev | Slava Claus | 5' 11" | 155 lbs. | 69.0" | Orthodox | 8 | 6 | 1 | |
| Tanner | Boser | The Bulldozer | 6' 2" | 205 lbs. | 75.0" | Orthodox | 21 | 10 | 1 | |
| Steve | Bosse | The Boss | 5' 11" | 205 lbs. | 72.0" | Orthodox | 12 | 2 | 0 | |
| Marcus | Bossett | The Grasshopper | 6' 1" | 215 lbs. | -- | Orthodox | 1 | 3 | 0 | |
| Chris | Bostick | -- | -- | -- | 6 | 3 | 0 | |||
| Poliana | Botelho | 5' 8" | 125 lbs. | 67.0" | Orthodox | 8 | 5 | 0 | ||
| Francois | Botha | White Buffalo | 6' 2" | 260 lbs. | -- | Orthodox | 0 | 1 | 0 | |
| Ilian | Bouafia | The Gorilla | 6' 5" | 185 lbs. | 78.0" | Southpaw | 7 | 0 | 0 | |
| Gregory | Bouchelaghem | 6' 2" | 183 lbs. | -- | Switch | 5 | 4 | 0 | ||
| Roy | Boughton | Black Dynamite | 6' 0" | 205 lbs. | -- | 14 | 8 | 0 | ||
| Rich | Bouphanouvong | 5' 7" | 170 lbs. | -- | 1 | 4 | 0 | |||
| Mike | Bourke | The Rhino | 6' 0" | 275 lbs. | -- | Orthodox | 10 | 16 | 1 |