Poids Légers Hommes
 | Jose Aguayo | 0-1-0 REC | #6849 |  |
 | Jose Ferreira | 1-0-0, 1NC REC | #4414 |  |
 | Jose Mendez | #8014 | | |
 | Joseph Donkor | 0-1-0 REC | #6760 |  |
 | Joseph Lowry | 0-2-0 REC | #5976 | |
 | Joseph Perez | 0-1-0 REC | #7233 | |
 | Josh Harvey | 0-1-0 REC | #5749 | |
 | Josh Shockley | 0-2-0 UFC | #5357 | |
 | Josh Thomson | 3-4-0 UFC | #2483 | |
 | Josh Togo | 0-1-0 REC | #6143 |  |
 | Josh Wick | 0-1-0 REC | #5327 | |
 | Joshua Adeboy | 1-0-0 REC | #3558 |  |
 | Joshua Adeboye | #7635 | | |
 | Jovidon Khojaev | 0-1-0 REC | #6282 |  |
 | Juan Pablo Vieira | 3-0-0 REC | #2344 |  |
 | Juan Sarrios | 0-1-0 REC | #7545 |  |
 | Juan Velasquez Jr. | #6933 | | |
| Julian Schlouch | 0-1-0 REC | #7810 |  |
 | Juliano Prescendo | 2-1-0 REC | #1191 | |
 | Junior Melo | 0-1-0 REC | #6103 | |