Combattants Brésil
| 501 |  | Joao Zeferino | 0-2-0 UFC | #2765 |  |
| 502 |  | Joaquim Silva | 7-5-0 UFC | #1050 | |
| 503 |  | Joe Moreira | 1-1-0 UFC | #4821 | |
| 504 |  | Joel dos Santos | #5661 | | |
| 505 |  | Joel Salviano | #5927 | | |
| 506 |  | Joelson Ferreira | 3-2-0 MMA | #6499 | |
| 507 |  | John Allan | 0-2-0, 1NC UFC | #3672 | |
| 508 |  | John Lineker | 12-4-0 UFC | #545 | |
| 509 |  | John Teixeira da Conceicao | 0-1-0 UFC | #3741 | |
| 510 |  | Johnny Eduardo | 3-5-0 UFC | #3070 | |
| 511 |  | Johnny Walker | 9-7-0, 1NC UFC | #117 | |
| 512 |  | Joice Mara | #6779 | | |
| 513 |  | Joilton Lutterbach | #4313 | | |
| 514 |  | Jonas Bilharinho | #6111 | | |
| 515 |  | Jonathan Caetano | #5968 | | |
| 516 |  | Jonathan Elias | #6696 | | |
| 517 |  | Jorge Bueno | #4449 | | |
| 518 |  | Jorge de Oliveira | 0-2-0 UFC | #5084 | |
| 519 |  | Jorge Santiago | 1-5-0 UFC | #3744 | |
| 520 |  | Jose Aldo | 14-9-0 UFC | #71 | |
| 521 |  | Jose Augusto | #2465 | | |
| 522 |  | Jose Carlos Lima | #6796 | | |
| 523 |  | Jose Delano | 1-0-0 UFC | #1257 | |
| 524 |  | Jose Henrique | 1-0-0 UFC | #1886 | |
| 525 |  | Jose Luiz | 1-0-0 UFC | #942 | |