Sorted alphabetically by last name · 2769 fighters
| Name | Nickname | |
|---|---|---|
| KN | Kennedy Nzechukwu | "Chosen" |
| KF | Kenny Florian | "KenFlo" |
| KR | Kenny Robertson | |
| KS | Kerry Schall | "Meat Truck" |
| KS | Ketlen Souza | "Esquentadinha" |
| KV | Ketlen Vieira | "Fenomeno" |
| KA | Kevin Aguilar | "Angel of Death" |
| KB |
| Kevin Borjas |
| "El Gallo Negro" |
| KB | Kevin Burns | "The Fire" |
| KC | Kevin Casey | "King" |