Poids Mouches Hommes
 | Jafel Filho | 3-2-0 UFC | #917 |  |
 | Jaime Alvarez | 1-0-0 REC | #5993 |  |
 | Jaime Lloyd | 1-0-0 REC | #1507 | |
 | Jamal Fayzullaev | 0-1-0 REC | #5705 |  |
 | Jamie Abbott-Bissett | 2-0-0 REC | #2643 |  |
 | Jamshid Tilyaev | #7483 |  | |
 | Jared Braun | 0-1-0 REC | #5933 | |
 | Jarred Brooks | 2-2-0 UFC | #2986 | |
 | Javier Cepeda | 0-1-0 REC | #6269 | |
 | Jawany Scott | 6-2-0 REC | #691 |  |
 | Jean Matos | 0-1-0 REC | #6829 | |
 | Jean Sevalho | 1-0-0 REC | #1980 | |
 | Jeff Molina | 3-0-0 UFC | #2130 | |
 | Jenel Lausa | 1-3-0 UFC | #3326 |  |
 | Jeremia Siregar | 0-1-0 REC | #5882 |  |
 | Jerome Rivera | 0-4-0 UFC | #3136 | |
 | Jesse Martinelli | 0-1-0 REC | #6702 | |
 | Jesus Aguilar | 4-3-0 UFC | #867 |  |
 | Jhonata Silva | 1-1-0 REC | #5620 | |
 | Jhonatan Oliveira | 1-2-0 REC | #2753 | |