Sorted alphabetically by last name · 2763 fighters
| Name | Nickname | |
|---|---|---|
| TW | Tyron Woodley | "The Chosen One" |
| TR | Tyrone Roberts | "Native Warrior" |
| TG | Tyson Griffin | |
| TN | Tyson Nam | |
| TP | Tyson Pedro | |
| UG | Ulysses Gomez | "Useless" |
| UN | Umar Nurmagomedov | |
| US |
| "Gorilla" |
| UH | Uriah Hall | "Prime Time" |
| UF | Urijah Faber | "The California Kid" |