Poids Mouches Hommes
 | Jeff Molina | 3-0-0 UFC | #2344 |  |
 | Jenel Lausa | 1-3-0 UFC | #3945 |  |
 | Jerome Rivera | 0-4-0 UFC | #3596 | |
 | Jesus Aguilar | 4-3-0 UFC | #1484 |  |
 | Jimmy Flick | 2-4-0 UFC | #2500 | |
 | Joby Sanchez | 1-4-0 UFC | #3351 | |
 | John Moraga | 8-6-0 UFC | #1335 | |
 | Jon delos Reyes | 1-3-0 UFC | #4085 |  |
 | Jordan Espinosa | 2-4-0 UFC | #2809 | |
 | Jose Maria Tome | 0-2-0 UFC | #5770 |  |
 | Jose Ochoa | 2-2-0 UFC | #1201 |  |
 | Joseph Benavidez | 15-6-0 UFC | #241 | |
 | Joseph Morales | 3-3-0 UFC | #970 | |
 | Josh Ferguson | 0-2-0 UFC | #5589 | |
 | Josh Sampo | 1-3-0 UFC | #4451 | |
 | Joshua Van | 11-1-0 UFC | #9 |  |
 | Juancamilo Ronderos | 0-2-0 UFC | #5209 |  |
 | Jussier da Silva | 9-7-0 UFC | #1115 | |
 | Justin Scoggins | 4-5-0 UFC | #2751 | |
 | Kai Kara-France | 8-5-0 UFC | #583 |  |