Poids Mouches Hommes
 | Jerome Rivera | 0-4-0 UFC | #3214 |  |
 | Jesse Martinelli | 0-1-0 REC | #6795 | |
 | Jesus Aguilar | 4-3-0 UFC | #964 |  |
 | Jhonata Silva | 1-1-0 REC | #5588 |  |
 | Jhonatan Oliveira | 1-2-0 REC | #2854 | |
 | Jimi Natividad | 0-1-0 REC | #5610 |  |
 | Jimmy Flick | 2-4-0 UFC | #2215 | |
 | Jiniushiyue | 2-2-0 REC | #3525 |  |
 | Jo Arai | 0-2-0 REC | #4186 |  |
 | Joao Elias | 0-1-0 REC | #6201 | |
 | Joao Victor Melo | 0-1-0 REC | #6261 | |
 | Joby Sanchez | 1-4-0 UFC | #2988 | |
 | Joe Fields | 6-0-0 REC | #244 |  |
 | Joe Hiramoto | 1-1-0 REC | #2746 | |
 | John Dave Almanza | 0-1-0 REC | #5542 | |
 | John Moraga | 8-6-0 UFC | #1220 | |
 | Jon delos Reyes | 1-3-0 UFC | #3601 |  |
 | Jonny Touma | 0-2-0 REC | #3766 |  |
 | Jordan Burkholder | 1-4-0 REC | #2981 | |
 | Jordan Espinosa | 2-4-0 UFC | #2540 | |