Poids Mouches Hommes
 | Jean Matos | 0-1-0 REC | #7467 |  |
 | Jean Sevalho | 2-0-0 REC | #1465 | |
 | Jeff Molina | 3-0-0 UFC | #2292 |  |
 | Jenel Lausa | 1-3-0 UFC | #3724 |  |
 | Jenilto Matos | 0-2-0 REC | #4599 | |
 | Jeremia Siregar | 0-1-0 REC | #6610 |  |
 | Jerome Rivera | 0-4-0 UFC | #3504 | |
 | Jesse Martinelli | 0-1-0 REC | #7170 | |
 | Jesus Aguilar | 4-3-0 UFC | #1304 |  |
 | Jhonata Silva | 1-1-0 REC | #6088 | |
 | Jhonatan Oliveira | 1-2-0 REC | #3306 | |
 | Jimi Natividad | 0-1-0 REC | #6667 | |
 | Jimmy Flick | 2-4-0 UFC | #2412 | |
 | Jin Tanaka | 1-0-0 REC | #1881 |  |
 | Jiniushiyue | 3-2-0 REC | #1565 |  |
 | Jo Arai | 0-2-0 REC | #4703 | |
 | Joao Elias | 0-1-0 REC | #6574 | |
 | Joao Victor Melo | 0-1-0 REC | #6624 | |
 | Joby Sanchez | 1-4-0 UFC | #3230 | |
 | Joe Fields | 6-0-0 REC | #815 |  |