Poids Légers Hommes
 | Josh Thomson | 3-4-0 UFC | #2495 |  |
 | Josh Togo | 0-1-0 REC | #6102 |  |
 | Josh Wick | 0-1-0 REC | #5374 | |
 | Joshua Adeboy | 1-0-0 REC | #3539 |  |
 | Joshua Adeboye | #7619 | | |
 | Jovidon Khojaev | 0-1-0 REC | #6223 |  |
 | Juan Pablo Vieira | 3-0-0 REC | #2321 |  |
 | Juan Sarrios | 0-1-0 REC | #7532 |  |
 | Juan Velasquez Jr. | #6927 | | |
 | Julian Schlouch | 0-1-0 REC | #7785 |  |
 | Juliano Prescendo | 2-1-0 REC | #1160 | |
 | Junior Melo | 0-1-0 REC | #6185 | |
 | Juri Ohara | #7685 |  | |
 | Justin Buchholz | 1-4-0 UFC | #3917 | |
 | Justin Gaethje | 11-5-0 UFC | #2 | |
 | Justin Gomez | 1-1-0 REC | #7663 | |
 | Justin James | 0-1-0 UFC | #7029 | |
 | Justin Jaynes | 1-4-0 UFC | #2962 | |
 | Justin Montalvo | 0-2-0 REC | #6067 | |
 | Justin Salas | 3-4-0 UFC | #3073 | |