Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| KY | Keiichiro Yamamiya | |
| KN | Keita Nakamura | "K-Taro" |
| KB | Keith Berish | "Sha Bang Bang" |
| KH | Keith Hackney | "The Giant Killer" |
| KJ | Keith Jardine | "The Dean of Mean" |
| KM | Keith Mielke | |
| KR | Keith Rockel | "Rock" |
| KW | Keith Wisniewski | "The Polish Connection" |
| KD | Kelly Dullanty | "Psycho" |
| KF | Kelly Faszholz |