Poids Légers Hommes
 | Jordan Vucenic | 0-2-0 UFC | #359 |  |
 | Jordon Tague | 0-1-0 REC | #6243 |  |
 | Jorge de Oliveira | 0-2-0 UFC | #4798 |  |
 | Jorge Gurgel | 3-4-0 UFC | #2931 | |
 | Jorge Patino | 0-1-0 UFC | #4212 | |
 | Jose Aguayo | 0-1-0 REC | #6811 | |
 | Jose Ferreira | 1-0-0, 1NC REC | #4149 |  |
 | Joseph Lowry | 0-2-0 REC | #5787 | |
 | Joseph Perez | 0-1-0 REC | #7039 | |
 | Josh Harvey | 0-1-0 REC | #5764 | |
 | Josh Shockley | 0-2-0 UFC | #5379 | |
 | Josh Thomson | 3-4-0 UFC | #2480 | |
 | Josh Togo | 0-1-0 REC | #6065 |  |
 | Josh Wick | 0-1-0 REC | #5464 | |
 | Joshua Adeboy | 1-0-0 REC | #3266 |  |
 | Joshua Adeboye | #7445 | | |
 | Jovidon Khojaev | 0-1-0 REC | #6229 |  |
 | Juan Pablo Vieira | 3-0-0 REC | #2022 | |
 | Juan Sarrios | 0-1-0 REC | #7166 |  |
 | Juan Velasquez Jr. | #6601 | |