| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 21 | 7 | 0 | |
| Martin | Buday | Badys | 6' 4" | 265 lbs. | 77.0" | Orthodox | 16 | 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 | 5 | 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 | 6 | 1 | |
| Paul | Buentello | The Headhunter | 6' 2" | 245 lbs. | 77.0" | Orthodox | 35 | 17 | 0 | |
| Marek | Bujlo | Bujdzilla | 6' 4" | 265 lbs. | 77.0" | Orthodox | 6 | 1 | 0 | |
| Modestas | Bukauskas | The Baltic Gladiator | 6' 3" | 205 lbs. | 76.0" | Switch | 19 | 7 | 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 | 14 | 9 | 0 | |
| Shane | Burgos | Hurricane | 5' 11" | 145 lbs. | 75.0" | Orthodox | 15 | 3 | 0 | |
| Joshua | Burkman | The People's Warrior | 5' 10" | 170 lbs. | 72.0" | Orthodox | 28 | 16 | 0 | |
| Justin | Burlinson | 6' 1" | 170 lbs. | 74.0" | Switch | 6 | 1 | 0 | ||
| Mads | Burnell | 5' 8" | 145 lbs. | 69.0" | Orthodox | 9 | 3 | 0 | ||
| Mikey | Burnett | The Eastside Assassin | 5' 6" | 170 lbs. | -- | Orthodox | 5 | 2 | 0 | |
| Kevin | Burns | The Fire | 5' 10" | 170 lbs. | 74.0" | Orthodox | 12 | 7 | 0 | |
| Gilbert | Burns | Durinho | 5' 10" | 170 lbs. | 71.0" | Orthodox | 22 | 9 | 0 | |
| Josh | Burns | The Hammer | 6' 1" | 244 lbs. | -- | 8 | 10 | 0 |