Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| KF | Kaue Fernandes | |
| KH | Kay Hansen | |
| KH | Kayla Harrison | |
| KK | Kaynan Kruschewsky | "Bahia" |
| KN | Kazuhiro Nakamura | "Kaz" |
| KT | Kazuki Tokudome | |
| KV | Kazula Vargas | |
| KS | Kazushi Sakuraba | "The Gracie Hunter" |
| KK | Keigo Kunihara | |
| KN | Keiichiro Nakamura |