Sorted alphabetically by last name · 2769 fighters
| Name | Nickname | |
|---|---|---|
| RD | Rolando Dy | "Dy Incredible" |
| RS | Roldan Sangcha'an | "The Executioner" |
| RG | Rolles Gracie | |
| RB | Roman Bogatov | |
| RD | Roman Dolidze | |
| RK | Roman Kopylov | |
| RM | Roman Mitichyan | |
| RS |
| "El Gallito" |
| RA | Romie Aram |
| RF | Ron Faircloth |