Poids Moyens Hommes
 | Jules Bruchez | 0-1-0 UFC | #7110 |  |
 | Julian Marquez | 3-5-0 UFC | #1985 | |
 | Julien Leblanc | 0-1-0 UFC | #2933 |  |
 | Julio Spadaccini | 1-0-0 REC | #1739 |  |
 | Jun Yong Park | 9-4-0 UFC | #610 |  |
 | Junior Orgulho | 0-1-0 REC | #7203 | |
 | Justin Barry | 0-1-0 REC | #6422 | |
 | Justin Detzel | 1-0-0 REC | #973 |  |
 | Justin Levens | 0-2-0 UFC | #5586 | |
 | Kacper Fratczak | 1-0-0 REC | #1221 |  |
 | Kacper Karski | 0-1-0 REC | #7274 | |
 | Kacper Pakeltys | 1-0-0 REC | #2234 | |
 | Kailan Hill | 0-1-0 REC | #6272 |  |
 | Kamil Oniszczuk | 2-3-0 REC | #1372 | |
 | Kamil Wojciechowski | 0-2-0 REC | #6094 | |
 | Karl Roberson | 4-6-0 UFC | #2152 | |
 | Kazuhiro Nakamura | 0-2-0 UFC | #4892 |  |
 | KB Bhullar | 0-2-0 UFC | #5329 | |
 | Keiichiro Yamamiya | 0-1-0 UFC | #7117 | |
 | Keith Jardine | 6-7-0 UFC | #1702 | |