Poids Lourds Hommes
 | Jim Mullen | 0-1-0 UFC | #7306 |  |
 | Jimmy Lawson | 0-1-0 REC | #5816 | |
 | Joe Charles | 2-2-0 UFC | #3831 | |
 | Joe Pardo | 0-1-0 UFC | #6210 | |
 | Joe Son | 0-1-0 UFC | #4888 | |
 | Joffie Houlton | 3-2-0 REC | #2071 |  |
 | John Campetella | 0-1-0 UFC | #5417 | |
 | John Lopez | 0-1-0 REC | #5228 | |
 | John Marsh | 0-1-0 UFC | #5103 | |
 | John Matua | 0-1-0 UFC | #4831 | |
 | John Winter | 0-1-0 REC | #7360 |  |
 | John-Olav Einemo | 0-2-0 UFC | #4021 |  |
 | Johnny Rhodes | 2-1-0 UFC | #4018 | |
 | Jon Cunningham | 0-1-0 REC | #7276 | |
 | Jon Hess | 1-0-0 UFC | #5350 | |
 | Jon Jones | 22-1-0, 1NC UFC | #5 | |
 | Jon Madsen | 4-1-0 UFC | #2900 | |
 | Jonathan Wiezorek | 1-0-0 UFC | #6229 | |
 | Jordan Heiderman | 1-2-0 REC | #5123 | |
 | Jordan Johnson | 4-0-0 UFC | #2152 | |