Poids Mi-Lourds Hommes
 | Jack Nilson | 1-1-0 UFC | #5024 |  |
 | Jackie Lee | 0-1-0 UFC | #6707 | |
 | Jacky Jeanne | 6-2-0 REC | #1349 |  |
 | Jair de Oliveira | 0-1-0 REC | #4835 |  |
 | Jake O'Brien | 4-3-0 UFC | #2379 | |
 | Jake Rosholt | 1-2-0 UFC | #4422 | |
 | Jakob Nedoh | 3-2-0 REC | #3686 |  |
 | Jamahal Hill | 6-4-0, 1NC UFC | #136 | |
 | Jamelle Jones | 1-3-0 REC | #4172 | |
 | James Hammortree | 0-1-0 UFC | #6223 | |
 | James Lee | 0-1-0 UFC | #5211 | |
 | James McSweeney | 1-2-0 UFC | #4298 |  |
 | James Webb | 3-1-0 REC | #2359 | |
 | Jamie Abdallah | 0-2-0 REC | #6378 |  |
 | Jamie MacDonald | 0-1-0 REC | #7079 |  |
 | Jan Blachowicz | 12-8-2 UFC | #65 |  |
 | Jan Gottvald | 1-0-0 REC | #7219 |  |
 | Jared Hamman | 2-5-0 UFC | #3364 | |
 | Jason Brilz | 3-4-0 UFC | #3093 | |
 | Jason DeLucia | 2-2-0 UFC | #3283 | |