Tous les combattants
 | Koji Kitao | 0-1-0 UFC | #5142 |  |
 | Koji Oishi | 0-2-0 UFC | #5182 | |
 | Koji Takeda | 3-2-0 REC | #377 | |
 | Koki Akada | 0-4-0 REC | #3331 | |
 | Kolton Englund | 0-2-0 REC | #4318 |  |
 | Konmon Deh | 0-2-0 REC | #5026 |  |
 | Konrad Dyrschka | 3-0-0 REC | #2517 |  |
 | Konrad Rusinski | 3-3-0 REC | #882 |  |
 | Konstantin Erokhin | 0-2-0 UFC | #4999 |  |
 | Konstantin Podoynitsyn | 0-1-0 REC | #6221 | |
 | Konstantinos Ntelis | 3-1-0 REC | #1482 |  |
 | Korey Kuppe | 0-3-0 REC | #5219 | |
 | Korey Taylor | 0-1-0 REC | #5573 |  |
 | Korey Windham | 0-1-0 REC | #7309 | |
 | Kory Moegenburg | 0-2-0 REC | #5364 | |
 | Kostadin Enev | 0-1-0 REC | #7922 |  |
 | Kosuke Terashima | 0-1-0 REC | #6073 | |
 | Kota Miura | 0-2-0 REC | #2247 | |
 | Kouki Nakagawa | 1-0-0 REC | #2252 | |
 | Kousuke Kindaichi | 0-1-0 REC | #6511 | |
 | Kousuke Sugimura | 1-0-0 REC | #3137 | |
 | Kouya Kanda | 1-1-0 REC | #6204 | |
 | Kovacs Zsombor | 0-1-0 REC | #8007 |  |
 | Koyomi Matsushima | 1-2-0 REC | #4319 | |
 | Kris McCray | 0-3-0 UFC | #4340 | |