Tous les combattants
 | Kaushik Saikumar | 0-1-0 REC | #4550 |  |
 | Kay Hansen | 1-3-0 UFC | #3075 |  |
 | Kayara Hartfield | #7621 | | |
 | Kayla Harrison | 3-0-0 UFC | #7 | |
 | Kayla Yontef | 1-0-0 REC | #5383 | |
 | Kaynan Kruschewsky | 0-2-0 UFC | #3782 |  |
 | Kaytlin Neil | 2-1-0 REC | #3807 | |
 | Kazbek Damaev | 0-1-0 REC | #5799 |  |
 | Kazuhiro Nakamura | 0-2-0 UFC | #4615 |  |
 | Kazuki Aimoto | #7433 | | |
 | Kazuki Tokudome | 1-3-0 UFC | #3705 | |
 | Kazuma Maruyama | 0-1-0 REC | #6450 | |
 | Kazumasa Majima | 1-1-0 REC | #1352 | |
 | Kazuo Takahashi | 1-0-0 UFC | #5007 | |
 | Kazushi Sakuraba | 1-0-0, 1NC UFC | #3580 | |
 | KB Bhullar | 0-2-0 UFC | #5183 |  |
 | Keegan Witbeck | 0-1-0 REC | #7090 | |
 | Kegan Agnew | 0-1-0 REC | #6558 | |
 | Kegan Gennrich | 2-2-0 REC | #3333 | |
 | Keigo Kunihara | 0-1-0 UFC | #6727 | |
 | Keiichiro Nakamura | 3-0-0 REC | #467 | |
 | Keiichiro Yamamiya | 0-1-0 UFC | #6700 | |
 | Keir Harvie | 2-3-0 REC | #3042 |  |
 | Keisuke Sasu | 1-3-0 REC | #3363 | |
 | Keita Nakamura | 4-7-0 UFC | #2145 | |