Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| KT | Khalid Taha | "The Warrior" |
| KR | Khalil Rountree Jr. | |
| KW | Khama Worthy | "The Death Star" |
| KC | Khamzat Chimaev | "Borz" |
| KW | Khaos Williams | "The OxFighter" |
| KA | Khusein Askhabov | "Nohcho" |
| KC | Kiefer Crosbie | "BDK" |
| KK | Kiichi Kunimoto | "Strasser" |
| KL | Kimo Leopoldo | |
| KG | King Green |