| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Jeremiah | Billington | 5' 9" | 205 lbs. | -- | Orthodox | 11 | 2 | 0 | ||
| Scott | Bills | 5' 10" | 170 lbs. | -- | 7 | 9 | 1 | |||
| Anthony | Birchak | El Toro | 5' 8" | 135 lbs. | 69.0" | Orthodox | 16 | 8 | 0 | |
| Chris | Birchler | The Big Buck | 6' 3" | 205 lbs. | -- | Switch | 7 | 4 | 0 | |
| Angad | Bisht | 5' 7" | 125 lbs. | 67.0" | Orthodox | 10 | 3 | 0 | ||
| Michael | Bisping | The Count | 6' 1" | 185 lbs. | 75.0" | Orthodox | 30 | 9 | 0 | |
| Amaury | Bitetti | 5' 9" | 185 lbs. | -- | Orthodox | 5 | 2 | 0 | ||
| Caio | Bittencourt | Leao | 6' 0" | 185 lbs. | 75.0" | Orthodox | 14 | 7 | 0 | |
| Davi | Bittencourt | The Black | 5' 5" | 135 lbs. | 65.0" | Orthodox | 14 | 4 | 0 | |
| Simon | Biyong | -- | 205 lbs. | -- | 7 | 1 | 0 | |||
| Jan | Blachowicz | 6' 2" | 205 lbs. | 78.0" | Orthodox | 29 | 10 | 1 | ||
| Jason | Black | The Black Legion | 5' 8" | 155 lbs. | -- | Orthodox | 23 | 4 | 1 | |
| Brad | Blackburn | Bad Brad | 5' 10" | 170 lbs. | 73.0" | Orthodox | 18 | 13 | 1 | |
| Jason | Blackford | -- | -- | -- | 3 | 3 | 0 | |||
| Tom | Blackledge | -- | 205 lbs. | -- | Orthodox | 10 | 7 | 0 | ||
| Sherrard | Blackledge | The Thriller | 5' 11" | 155 lbs. | 75.0" | Orthodox | 5 | 1 | 0 | |
| Da'Mon | Blackshear | The Monster | 5' 10" | 135 lbs. | 72.0" | Switch | 15 | 7 | 1 | |
| Chasen | Blair | Mestizo | 5' 10" | 155 lbs. | 71.0" | Orthodox | 6 | 3 | 0 | |
| Erin | Blanchfield | Cold Blooded | 5' 4" | 125 lbs. | 66.0" | Orthodox | 13 | 2 | 0 | |
| Maximo | Blanco | Maxi | 5' 8" | 145 lbs. | 71.0" | Orthodox | 12 | 8 | 1 | |
| David | Blanco | 5' 7" | 145 lbs. | -- | 2 | 0 | 0 | |||
| Curtis | Blaydes | Razor | 6' 4" | 265 lbs. | 80.0" | Orthodox | 18 | 5 | 0 | |
| Tereza | Bleda | 5' 9" | 125 lbs. | 71.0" | Orthodox | 7 | 1 | 0 | ||
| Arlene | Blencowe | Angerfist | 5' 5" | 145 lbs. | -- | 9 | 6 | 0 |