Poids Moyens Hommes
 | Julien Leblanc | #7407 |  | |
 | Julio Spadaccini | 1-0-0 REC | #837 |  |
 | Jun Yong Park | 9-4-0 UFC | #480 |  |
 | Junior Orgulho | 0-1-0 REC | #6642 | |
 | Justin Barry | 0-1-0 REC | #6498 |  |
 | Justin Levens | 0-2-0 UFC | #5407 | |
 | Kacper Karski | 0-1-0 REC | #6591 |  |
 | Kacper Pakeltys | 1-0-0 REC | #1547 | |
 | Kailan Hill | 0-1-0 REC | #6057 |  |
 | Kamil Oniszczuk | 2-3-0 REC | #569 | |
 | Kamil Wojciechowski | 0-2-0 REC | #5677 | |
 | Karl Roberson | 4-6-0 UFC | #1956 | |
 | Kazuhiro Nakamura | 0-2-0 UFC | #4608 |  |
 | KB Bhullar | 0-2-0 UFC | #5145 | |
 | Keiichiro Yamamiya | 0-1-0 UFC | #6646 | |
 | Keith Jardine | 6-7-0 UFC | #1631 | |
 | Keith Rockel | 1-1-0 UFC | #5216 | |
 | Kellian Streicher | #7469 |  | |
 | Kelvin Gastelum | 14-10-0, 1NC UFC | #198 | |
 | Kendall Grove | 7-6-0 UFC | #1655 | |