Tous les combattants
 | Katsuhisa Fujii | 1-1-0 UFC | #5605 |  |
 | Katsunori Kikuno | 2-3-0 UFC | #3506 | |
 | Katsuyoshi Sasaki | 0-1-0 REC | #7383 | |
 | Kaua Fernandes | 0-1-0 REC | #7263 |  |
 | Kauan Leopoldina | 0-1-0 REC | #6480 | |
 | Kaue Fernandes | 3-2-0 UFC | #694 | |
 | Kaue Vaz | 0-1-0 REC | #5428 | |
 | Kaushik Saikumar | 0-1-0 REC | #4879 |  |
 | Kay Hansen | 1-3-0 UFC | #3296 |  |
 | Kayara Hartfield | 1-0-0 REC | #1757 | |
 | Kayck Alencar | 0-1-0 REC | #6308 | |
 | Kayla Harrison | 3-0-0 UFC | #7 | |
 | Kayla Yontef | 1-0-0 REC | #5595 | |
 | Kaynan Kruschewsky | 0-2-0 UFC | #4055 | |
 | Kaytlin Neil | 2-1-0 REC | #4227 | |
 | Kazakbai Tilenov | 0-1-0 REC | #6477 |  |
 | Kazbek Damaev | 0-1-0 REC | #6676 |  |
 | Kazuhiro Nakamura | 0-2-0 UFC | #5046 | |
 | Kazuki Aimoto | #8031 | | |
 | Kazuki Tokudome | 1-3-0 UFC | #4135 | |
 | Kazuma Maruyama | 0-1-0 REC | #6586 | |
 | Kazumasa Majima | 2-2-0 REC | #1201 | |
 | Kazuo Takahashi | 1-0-0 UFC | #5144 | |
 | Kazushi Sakuraba | 1-0-0, 1NC UFC | #3963 | |
 | KB Bhullar | 0-2-0 UFC | #5636 |  |