Tous les combattants
 | Koji Kitao | 0-1-0 UFC | #5040 |  |
 | Koji Oishi | 0-2-0 UFC | #5194 | |
 | Koji Takeda | 2-2-0 REC | #1923 | |
 | Koki Akada | 0-4-0 REC | #3292 | |
 | Kolton Englund | 0-2-0 REC | #4273 |  |
 | Konmon Deh | 0-2-0 REC | #4974 |  |
 | Konrad Dyrschka | 3-0-0 REC | #2435 |  |
 | Konrad Rusinski | 3-3-0 REC | #727 |  |
 | Konstantin Erokhin | 0-2-0 UFC | #4961 |  |
 | Konstantin Podoynitsyn | 0-1-0 REC | #6158 | |
 | Konstantinos Ntelis | 3-1-0 REC | #1356 |  |
 | Korey Kuppe | 0-3-0 REC | #5215 | |
 | Korey Taylor | 0-1-0 REC | #5548 |  |
 | Korey Windham | 0-1-0 REC | #7332 | |
 | Kory Moegenburg | 0-2-0 REC | #5324 | |
 | Kostadin Enev | 0-1-0 REC | #7860 |  |
 | Kosuke Terashima | 0-1-0 REC | #6044 | |
 | Kota Miura | 0-2-0 REC | #2192 | |
 | Kouki Nakagawa | 1-0-0 REC | #2157 | |
 | Kousuke Kindaichi | 0-1-0 REC | #6504 | |
 | Kousuke Sugimura | 1-0-0 REC | #3028 | |
 | Kouya Kanda | 1-1-0 REC | #6202 | |
 | Kovacs Zsombor | 0-1-0 REC | #7945 |  |
 | Koyomi Matsushima | 1-2-0 REC | #4271 | |
 | Kris McCray | 0-3-0 UFC | #4303 | |