Sorted alphabetically by last name · 2707 fighters
| Name | Nickname | |
|---|---|---|
| RG | Rolles Gracie | |
| RB | Roman Bogatov | |
| RD | Roman Dolidze | |
| RK | Roman Kopylov | |
| RM | Roman Mitichyan | |
| RS | Roman Salazar | "El Gallito" |
| RA | Romie Aram | |
| RF | Ron Faircloth | |
| RS | Ron Stallings | "The Choir Boy" |
| RW | Ron Waterman | "H20" |