Sorted alphabetically by last name · 2711 fighters
| Name | Nickname | |
|---|---|---|
| RP | Raquel Pennington | "Rocky" |
| RC | Rashad Coulter | "Daywalker" |
| RE | Rashad Evans | "Suga" |
| RM | Rashid Magomedov | "Highlander" |
| RR | Raul Rosas Jr. | "El Nino Problema" |
| RP | Raulian Paiva | |
| RO | Ravena Oliveira | "Kenoudy" |
| RB | Ray Borg | "The Tazmexican Devil" |
| RR | Ray Rodriguez | "The Judge" |
| RW | Ray Wizard |