Sorted alphabetically by last name · 2769 fighters
| Name | Nickname | |
|---|---|---|
| KR | Kevin Rosier | |
| KV | Kevin Vallejos | "El Chino" |
| KN | Khabib Nurmagomedov | "The Eagle" |
| KI | Khadis Ibragimov | |
| KM | Khalid Murtazaliev | |
| KT | Khalid Taha | "The Warrior" |
| KR | Khalil Rountree Jr. | |
| KW |
| Khama Worthy |
| "The Death Star" |
| KC | Khamzat Chimaev | "Borz" |
| KW | Khaos Williams | "The OxFighter" |