Tous les combattants
 | Kody Steele | 0-1-0 UFC | #2460 |  |
 | Kohl Laren | 0-3-0 REC | #2817 | |
 | Koji Kitao | 0-1-0 UFC | #4520 |  |
 | Koji Oishi | 0-2-0 UFC | #4804 | |
 | Koji Takeda | 2-2-0 REC | #3108 | |
 | Koki Akada | 0-3-0 REC | #3210 | |
 | Kolton Englund | 0-2-0 REC | #3715 | |
 | Konmon Deh | 0-2-0 REC | #4785 |  |
 | Konrad Dyrschka | 3-0-0 REC | #1697 |  |
 | Konrad Rusinski | 2-2-0 REC | #1413 |  |
 | Konstantin Erokhin | 0-2-0 UFC | #4736 |  |
 | Konstantin Podoynitsyn | 0-1-0 REC | #5457 | |
 | Konstantinos Ntelis | 2-1-0 REC | #3219 |  |
 | Korey Kuppe | 0-3-0 REC | #4902 | |
 | Korey Taylor | #7252 |  | |
 | Korey Windham | 0-1-0 REC | #6801 | |
 | Kory Moegenburg | 0-2-0 REC | #5011 | |
 | Kostadin Enev | 0-1-0 REC | #7238 |  |
 | Kosuke Terashima | 0-1-0 REC | #5517 | |
 | Kota Miura | 0-2-0 REC | #1709 | |
 | Kousuke Kindaichi | 0-1-0 REC | #5600 | |
 | Kousuke Sugimura | 1-0-0 REC | #2091 | |
 | Kouya Kanda | 1-1-0 REC | #5770 | |
 | Kovacs Zsombor | 0-1-0 REC | #7527 |  |
 | Koyomi Matsushima | 1-1-0 REC | #5815 | |