Poids Mi-Lourds Hommes
 | Jack Nilson | 1-1-0 UFC | #5026 |  |
 | Jackie Lee | 0-1-0 UFC | #6686 | |
 | Jacky Jeanne | 6-2-0 REC | #1319 |  |
 | Jair de Oliveira | 0-1-0 REC | #4755 |  |
 | Jake O'Brien | 4-3-0 UFC | #2366 | |
 | Jake Rosholt | 1-2-0 UFC | #4365 | |
 | Jakob Nedoh | 3-2-0 REC | #3661 |  |
 | Jamahal Hill | 6-4-0, 1NC UFC | #131 | |
 | Jamelle Jones | 1-3-0 REC | #4158 | |
 | James Hammortree | 0-1-0 UFC | #6246 | |
 | James Lee | 0-1-0 UFC | #5140 | |
 | James McSweeney | 1-2-0 UFC | #4288 |  |
 | James Webb | 3-1-0 REC | #2325 | |
 | Jamie Abdallah | 0-2-0 REC | #6368 |  |
 | Jamie MacDonald | 0-1-0 REC | #7028 |  |
 | Jan Blachowicz | 12-8-2 UFC | #60 |  |
 | Jan Gottvald | 1-0-0 REC | #7200 |  |
 | Jared Hamman | 2-5-0 UFC | #3331 | |
 | Jason Brilz | 3-4-0 UFC | #3072 | |
 | Jason DeLucia | 2-2-0 UFC | #3275 | |