Sorted alphabetically by last name · 2711 fighters
| Name | Nickname | |
|---|---|---|
| RT | Ricky Turcios | |
| RF | Riki Fukuda | |
| RN | Rin Nakai | |
| RF | Rinat Fakhretdinov | "Gladiator" |
| RN | Rinya Nakamura | "Hybred" |
| RK | Rizvan Kuniev | |
| RC | Roan Carneiro | "Jucao" |
| RB | Rob Broughton | "The Bear" |
| RE | Rob Emerson | "The Saint" |
| RF | Rob Font |