Tous les combattants
 | Katsuhisa Fujii | 1-1-0 UFC | #5525 |  |
 | Katsunori Kikuno | 2-3-0 UFC | #3433 | |
 | Katsuyoshi Sasaki | 0-1-0 REC | #7159 | |
 | Kaua Fernandes | 0-1-0 REC | #7109 |  |
 | Kauan Leopoldina | 0-1-0 REC | #6209 | |
 | Kaue Fernandes | 3-1-0 UFC | #1076 | |
 | Kaue Vaz | 0-1-0 REC | #5132 | |
 | Kaushik Saikumar | 0-1-0 REC | #4792 |  |
 | Kay Hansen | 1-3-0 UFC | #3204 |  |
 | Kayara Hartfield | 1-0-0 REC | #1277 | |
 | Kayck Alencar | 0-1-0 REC | #6410 | |
 | Kayla Harrison | 3-0-0 UFC | #9 | |
 | Kayla Yontef | 1-0-0 REC | #5646 | |
 | Kaynan Kruschewsky | 0-2-0 UFC | #3958 | |
 | Kaytlin Neil | 2-1-0 REC | #4174 | |
 | Kazakbai Tilenov | 0-1-0 REC | #6614 |  |
 | Kazbek Damaev | 0-1-0 REC | #6592 |  |
 | Kazuhiro Nakamura | 0-2-0 UFC | #4924 | |
 | Kazuki Aimoto | #7815 | | |
 | Kazuki Tokudome | 1-3-0 UFC | #3965 | |
 | Kazuma Maruyama | 0-1-0 REC | #6679 | |
 | Kazumasa Majima | 2-1-0 REC | #905 | |
 | Kazuo Takahashi | 1-0-0 UFC | #5119 | |
 | Kazushi Sakuraba | 1-0-0, 1NC UFC | #3878 | |
 | KB Bhullar | 0-2-0 UFC | #5407 |  |