Poids Légers Hommes
 | Joshua Adeboy | 1-0-0 REC | #3745 |  |
 | Joshua Adeboye | #7759 | | |
 | Jovidon Khojaev | 0-1-0 REC | #6366 |  |
 | Juan Pablo Vieira | 4-0-0 REC | #488 |  |
 | Juan Sarrios | 0-1-0 REC | #7760 |  |
 | Juan Velasquez Jr. | #7084 |  | |
 | Julian Schlouch | 0-1-0 REC | #7914 |  |
 | Juliano Prescendo | 2-1-0 REC | #1544 | |
| Julio Cesar Chaves | #8156 | | |
 | Junior Melo | 0-1-0 REC | #6421 | |
 | Juri Ohara | #7841 |  | |
 | Justin Buchholz | 1-4-0 UFC | #4044 | |
 | Justin Gaethje | 11-5-0 UFC | #8 | |
 | Justin Gomez | 1-1-0 REC | #7689 | |
 | Justin James | 0-1-0 UFC | #7150 | |
 | Justin Jaynes | 1-4-0 UFC | #3090 | |
 | Justin Montalvo | 0-2-0 REC | #6051 | |
 | Justin Salas | 3-4-0 UFC | #3165 | |
 | Kacper Cholewa | #8178 |  | |
 | Kacper Formela | 2-2-0 REC | #2050 | |