Combattants Etats-Unis
| 301 |  | Brian Gassaway | 0-1-0 UFC | #6338 |  |
| 302 |  | Brian Geraghty | 0-1-0 UFC | #5757 | |
| 303 |  | Brian Houston | 0-2-0 UFC | #5613 | |
| 304 |  | Brian Johnston | 2-4-0 UFC | #3371 | |
| 305 |  | Brian Kelleher | 8-9-0 UFC | #1250 | |
| 306 |  | Brian Melancon | 1-1-0 UFC | #4908 | |
| 307 |  | Brian Mitchell | 1-0-0 REC | #7373 | |
| 308 |  | Brian Ortega | 8-5-0, 1NC UFC | #265 | |
| 309 |  | Brian Stann | 6-5-0 UFC | #1980 | |
| 310 |  | Brian Stapleton | 0-1-0 REC | #7066 | |
| 311 |  | Brian Torres | 1-0-0 REC | #6227 | |
| 312 |  | Brianna Fortino | 1-1-0 UFC | #4608 | |
| 313 |  | Brigid Chase | 0-1-0 REC | #6274 | |
| 314 |  | Bristol Marunde | 0-2-0 UFC | #4192 | |
| 315 |  | Brittany Camozzi | 0-2-0 REC | #6956 | |
| 316 |  | Brittney Cloudy | 0-4-0 REC | #3905 | |
| 317 |  | Brittney Elkin | 0-2-0 REC | #4565 | |
| 318 |  | Briven Sullivan | 1-0-0 REC | #1691 | |
| 319 |  | Brock Jardine | 0-2-0 UFC | #6286 | |
| 320 |  | Brock Larson | 3-3-0 UFC | #3215 | |
| 321 |  | Brock Lesnar | 4-3-0, 1NC UFC | #471 | |
| 322 |  | Brodie Farber | 0-2-0 UFC | #5349 | |
| 323 |  | Brogan Walker | 0-3-0 UFC | #3034 | |
| 324 |  | Brok Hopwood | 0-1-0 REC | #6012 | |
| 325 |  | Brok Weaver | 1-2-0 UFC | #4119 | |