Poids Plumes Hommes
 | Jean-Jacques Lubaya | 0-2-0 REC | #4106 |  |
 | Jeferson dos Santos | 0-1-0 REC | #6286 |  |
 | Jefferson Pontes | 0-1-0 REC | #7518 | |
 | Jeka Saragih | 1-3-0 UFC | #2514 |  |
 | Jelle Zeegers | 0-1-0 REC | #6626 |  |
 | Jeong Yeong Lee | 2-2-0 UFC | #1736 |  |
 | Jeremy Alba | 1-0-0 REC | #6665 |  |
 | Jeremy Henry | 0-2-0 REC | #4592 | |
 | Jeremy Kennedy | 3-1-0 UFC | #1521 |  |
 | Jeremy Larsen | 0-3-0 UFC | #4925 | |
 | Jerry Kvarnstrom | 0-1-0 REC | #7735 |  |
 | Jesse Stirn | 1-3-0 REC | #5129 | |
 | Jesus Pinedo | 1-1-0 UFC | #286 |  |
 | Jhonatan Cordeiro | 0-1-0 REC | #6192 | |
 | Jianping Yang | 0-1-0 UFC | #5966 |  |
 | Jim Alers | 1-2-0, 1NC UFC | #3973 | |
 | Jim Hettes | 3-3-0 UFC | #3423 | |
 | Jin Aoi | 0-2-0 REC | #4007 |  |
 | Jin Wakita | 0-1-0 REC | #5934 | |
 | Joan Rodriguez | 0-1-0 REC | #5351 |  |