Poids Lourds Hommes
 | Jim Mullen | 0-1-0 UFC | #7325 |  |
 | Jimmy Lawson | 0-1-0 REC | #5807 | |
 | Joe Charles | 2-2-0 UFC | #3844 | |
 | Joe Pardo | 0-1-0 UFC | #6275 | |
 | Joe Son | 0-1-0 UFC | #4832 | |
 | Joffie Houlton | 3-2-0 REC | #2087 |  |
 | John Campetella | 0-1-0 UFC | #5417 | |
 | John Lopez | 0-1-0 REC | #5247 | |
 | John Marsh | 0-1-0 UFC | #5138 | |
 | John Matua | 0-1-0 UFC | #4826 | |
 | John Winter | 0-1-0 REC | #7377 |  |
 | John-Olav Einemo | 0-2-0 UFC | #4032 |  |
 | Johnny Rhodes | 2-1-0 UFC | #4015 | |
 | Jon Cunningham | 0-1-0 REC | #7233 | |
 | Jon Hess | 1-0-0 UFC | #5378 | |
 | Jon Jones | 22-1-0, 1NC UFC | #6 | |
 | Jon Madsen | 4-1-0 UFC | #2897 | |
 | Jonathan Wiezorek | 1-0-0 UFC | #6248 | |
 | Jordan Heiderman | 1-2-0 REC | #5140 | |
 | Jordan Johnson | 4-0-0 UFC | #2142 | |