Poids Légers Hommes
 | Jefferson Almeida | 0-1-0 REC | #3894 |  |
 | Jefferson Nascimento | 2-0-0 REC | #1741 | |
 | Jeremy Fattorusso | 0-1-0 REC | #6716 |  |
 | Jeremy Stephens | 15-19-0, 1NC UFC | #243 | |
 | Jermaine Edwards | 2-0-0 REC | #2287 | |
 | Jesse Hannam | 0-1-0 REC | #6057 | |
 | Jesse Roberts | 0-1-0 REC | #6748 | |
 | Jhon Bryan | 0-1-0 REC | #5040 | |
 | Jhon Grueso | 0-1-0 REC | #5972 |  |
 | Jim Miller | 27-18-0, 1NC UFC | #46 | |
 | Jimmy Vienot | 1-0-0 REC | #1121 |  |
 | Jimmy Washington | 0-1-0 REC | #5187 | |
 | JJ Okanovich | 1-0-0 REC | #6394 | |
 | Joao Marcos Pierini | 0-1-0 UFC | #4898 | |
 | Joao Moraes | 2-0-0 REC | #4396 | |
 | Joao Zeferino | 0-2-0 UFC | #2519 | |
 | Joaquim Silva | 7-5-0 UFC | #740 | |
 | Joe Brammer | 0-2-0 UFC | #4894 | |
 | Joe Duffy | 4-4-0 UFC | #2143 |  |
 | Joe Ellenberger | 1-1-0 UFC | #5758 | |