Poids Légers Hommes
 | Jefferson Nascimento | 0-1-0 UFC | #756 |  |
 | Jeremiah Huff | 0-1-0 REC | #6993 |  |
 | Jeremy Fattorusso | 0-1-0 REC | #7409 | |
 | Jeremy Stephens | 15-20-0, 1NC UFC | #222 | |
 | Jermaine Edwards | 2-0-0 REC | #3009 | |
 | Jesse Hannam | 0-1-0 REC | #6428 | |
 | Jesse Roberts | 0-1-0 REC | #7566 | |
 | Jhon Bryan | 0-1-0 REC | #5621 | |
 | Jhon Grueso | 0-1-0 REC | #6666 |  |
 | Jim Miller | 28-18-0, 1NC UFC | #34 | |
 | Jimmy Vienot | 1-1-0 REC | #1814 |  |
 | Jimmy Washington | 0-1-0 REC | #5966 | |
 | JJ Okanovich | 1-0-0 REC | #6977 | |
 | Joao Marcos Pierini | 0-1-0 UFC | #5130 | |
 | Joao Moraes | 2-0-0 REC | #5058 | |
 | Joao Zeferino | 0-2-0 UFC | #2700 | |
 | Joaquim Silva | 7-5-0 UFC | #959 | |
 | Joe Brammer | 0-2-0 UFC | #5126 | |
 | Joe Duffy | 4-4-0 UFC | #2238 |  |
 | Joe Ellenberger | 1-1-0 UFC | #5772 | |