| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Steve | Bruno | Hollywood | 5' 10" | 170 lbs. | -- | Orthodox | 15 | 6 | 0 | |
| Fernando | Bruno | Acougueiro | 5' 6" | 145 lbs. | -- | 15 | 4 | 0 | ||
| Derek | Brunson | The One | 6' 1" | 185 lbs. | 77.0" | Southpaw | 23 | 9 | 0 | |
| Josh | Bryant | The Beast | 5' 10" | 185 lbs. | -- | Orthodox | 15 | 4 | 0 | |
| Dennis | Bryant | The Beard | 6' 0" | 205 lbs. | -- | Orthodox | 5 | 2 | 0 | |
| Robert | Bryczek | 6' 0" | 185 lbs. | 75.0" | Orthodox | 17 | 6 | 0 | ||
| Lukasz | Brzeski | The Bull | 6' 4" | 236 lbs. | 78.0" | Orthodox | 9 | 4 | 1 | |
| Justin | Buchholz | 6' 0" | 155 lbs. | 73.0" | Orthodox | 15 | 10 | 0 | ||
| Zak | Bucia | 5' 10" | 170 lbs. | -- | 17 | 8 | 0 | |||
| Courtney | Buck | 5' 10" | 135 lbs. | -- | Orthodox | 12 | 11 | 0 | ||
| Joaquin | Buckley | New Mansa | 5' 10" | 170 lbs. | 76.0" | Southpaw | 18 | 6 | 0 | |
| Martin | Buday | Badys | 6' 4" | 265 lbs. | 77.0" | Orthodox | 13 | 2 | 0 | |
| Julia | Budd | 5' 7" | 145 lbs. | 67.0" | 10 | 2 | 0 | |||
| Dylan | Budka | The Mindless Hulk | 6' 0" | 185 lbs. | 75.0" | Switch | 7 | 3 | 0 | |
| Mike | Budnik | 5' 9" | 145 lbs. | 68.0" | Orthodox | 13 | 4 | 0 | ||
| Francisco | Bueno | 5' 9" | 225 lbs. | -- | Orthodox | 5 | 2 | 0 | ||
| Mayra | Bueno Silva | Sheetara | 5' 6" | 135 lbs. | 66.0" | Orthodox | 10 | 3 | 1 | |
| Paul | Buentello | The Headhunter | 6' 2" | 245 lbs. | 77.0" | Orthodox | 35 | 17 | 0 | |
| Modestas | Bukauskas | The Baltic Gladiator | 6' 3" | 205 lbs. | 78.0" | Switch | 15 | 6 | 0 | |
| Lee Kwan | Bum | 6' 2" | 286 lbs. | -- | Orthodox | 0 | 1 | 0 | ||
| Josh | Bumgarner | 6' 1" | 170 lbs. | -- | 6 | 4 | 0 | |||
| Shawn | Bunch | Bunch the Great | 5' 5" | 135 lbs. | -- | 7 | 3 | 0 | ||
| Felipe | Bunes | Felipinho | 5' 7" | 125 lbs. | 69.0" | Orthodox | 13 | 7 | 0 | |
| Shane | Burgos | Hurricane | 5' 11" | 145 lbs. | 75.0" | Orthodox | 15 | 3 | 0 |