Sorted alphabetically by last name · 2778 fighters
| Name | Nickname | |
|---|---|---|
| RS | Roldan Sangcha'an | "The Executioner" |
| RG | Rolles Gracie | |
| RB | Roman Bogatov | |
| RD | Roman Dolidze | |
| RK | Roman Kopylov | |
| RM | Roman Mitichyan | |
| RS | Roman Salazar | "El Gallito" |
| RA |
| RF | Ron Faircloth |
| RS | Ron Stallings | "The Choir Boy" |