Combattants Etats-Unis
| 301 |  | Brian Melancon | 1-1-0 UFC | #4665 |  |
| 302 |  | Brian Mitchell | 1-0-0 REC | #7089 | |
| 303 |  | Brian Ortega | 8-5-0, 1NC UFC | #248 | |
| 304 |  | Brian Stann | 6-5-0 UFC | #1904 | |
| 305 |  | Brian Stapleton | 0-1-0 REC | #6794 | |
| 306 |  | Brian Torres | 1-0-0 REC | #6376 | |
| 307 |  | Brianna Fortino | 1-1-0 UFC | #4538 | |
| 308 |  | Brigid Chase | 0-1-0 REC | #6043 | |
| 309 |  | Bristol Marunde | 0-2-0 UFC | #4125 | |
| 310 |  | Brittany Camozzi | 0-2-0 REC | #6734 | |
| 311 |  | Brittney Cloudy | 0-4-0 REC | #3591 | |
| 312 |  | Brittney Elkin | 0-2-0 REC | #4636 | |
| 313 |  | Briven Sullivan | 1-0-0 REC | #1159 | |
| 314 |  | Brock Jardine | 0-2-0 UFC | #5931 | |
| 315 |  | Brock Larson | 3-3-0 UFC | #3056 | |
| 316 |  | Brock Lesnar | 4-3-0, 1NC UFC | #462 | |
| 317 |  | Brodie Farber | 0-2-0 UFC | #5180 | |
| 318 |  | Brogan Walker | 0-3-0 UFC | #2797 | |
| 319 |  | Brok Hopwood | 0-1-0 REC | #5581 | |
| 320 |  | Brok Weaver | 1-2-0 UFC | #4052 | |
| 321 |  | Bryan Barberena | 9-10-0 UFC | #948 | |
| 322 |  | Bryan Battle | 7-1-0, 1NC UFC | #717 | |
| 323 |  | Bryan Caraway | 6-4-0 UFC | #1976 | |
| 324 |  | Bryan Nuro | 0-1-0 REC | #6469 | |
| 325 |  | Bryant Shell | 0-1-0 REC | #6296 | |