Tous les combattants
 | Kayla Harrison | 3-0-0 UFC | #7 |  |
 | Kayla Yontef | 1-0-0 REC | #5570 | |
 | Kaynan Kruschewsky | 0-2-0 UFC | #3989 |  |
 | Kaytlin Neil | 2-1-0 REC | #4156 | |
 | Kazakbai Tilenov | 0-1-0 REC | #6442 |  |
 | Kazbek Damaev | 0-1-0 REC | #6676 |  |
 | Kazuhiro Nakamura | 0-2-0 UFC | #4977 |  |
 | Kazuki Aimoto | #7952 | | |
 | Kazuki Tokudome | 1-3-0 UFC | #4049 | |
 | Kazuma Maruyama | 0-1-0 REC | #6517 | |
 | Kazumasa Majima | 2-2-0 REC | #1079 | |
 | Kazuo Takahashi | 1-0-0 UFC | #5091 | |
 | Kazushi Sakuraba | 1-0-0, 1NC UFC | #3922 | |
 | KB Bhullar | 0-2-0 UFC | #5575 |  |
 | Keegan Witbeck | 0-1-0 REC | #7659 | |
 | Kegan Agnew | 0-1-0 REC | #7346 | |
 | Kegan Gennrich | 3-2-0 REC | #1292 | |
 | Keigo Kunihara | 0-1-0 UFC | #7305 | |
 | Keiichiro Nakamura | 3-0-0 REC | #1404 | |
 | Keiichiro Yamamiya | 0-1-0 UFC | #7208 | |
 | Keir Harvie | 2-3-0 REC | #3636 |  |
 | Keisuke Sasu | 1-4-0 REC | #3098 | |
 | Keita Nakamura | 4-7-0 UFC | #2362 | |
 | Keith Berish | 0-1-0, 1NC UFC | #4843 | |
 | Keith Hackney | 2-2-0 UFC | #3026 | |