Poids Légers Hommes
 | Josh Togo | 0-1-0 REC | #6209 |  |
 | Josh Wick | 0-1-0 REC | #5194 |  |
 | Joshua Adeboy | 1-0-0 REC | #3780 |  |
 | Joshua Adeboye | #7801 | | |
 | Jovidon Khojaev | 0-1-0 REC | #6372 |  |
 | Juan Pablo Vieira | 4-0-0 REC | #526 |  |
 | Juan Sarrios | 0-1-0 REC | #7787 |  |
 | Juan Velasquez Jr. | #7103 | | |
 | Julian Schlouch | 0-1-0 REC | #7936 |  |
 | Juliano Prescendo | 2-1-0 REC | #1588 | |
| Julio Cesar Chaves | #8151 | | |
 | Junior Melo | 0-1-0 REC | #6453 | |
 | Juri Ohara | #7858 |  | |
 | Justin Buchholz | 1-4-0 UFC | #4080 | |
 | Justin Gaethje | 11-5-0 UFC | #9 | |
 | Justin Gomez | 1-1-0 REC | #7727 | |
 | Justin James | 0-1-0 UFC | #7191 | |
 | Justin Jaynes | 1-4-0 UFC | #3110 | |
 | Justin Montalvo | 0-2-0 REC | #6013 | |
 | Justin Salas | 3-4-0 UFC | #3182 | |