Sorted alphabetically by last name · 2711 fighters
| Name | Nickname | |
|---|---|---|
| OS | Oumar Sy | |
| OS | Ovince Saint Preux | |
| OD | Ozzy Diaz | |
| PG | Pablo Garza | "The Scarecrow" |
| PH | Paddy Holohan | "The Hooligan" |
| PP | Paddy Pimblett | "The Baddy" |
| PV | Paige VanZant | "12 Gauge" |
| PK | Pannie Kianzad | "Banzai" |
| PA | Papy Abedi | "Makambo" |
| PP | Parker Porter |