Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| KG | Kelvin Gastelum | |
| KS | Ken Shamrock | "The World's Most Dangerous Man" |
| KS | Ken Stone | |
| KG | Kendall Grove | "Da Spyder" |
| KY | Kenichi Yamamoto | |
| KN | Kennedy Nzechukwu | "Chosen" |
| KF | Kenny Florian | "KenFlo" |
| KR | Kenny Robertson | |
| KS | Kerry Schall | "Meat Truck" |
| KS | Ketlen Souza | "Esquentadinha" |