Poids Plumes Hommes
 | Robert Ruchala | 0-2-0 UFC | #1205 |  |
 | Roberto Hernandez | 4-2-0 REC | #3186 |  |
 | Roberto Romero | 0-2-0 UFC | #2784 |  |
 | Rocky Lee | 0-1-0 UFC | #4074 |  |
 | Rodion Mubarakshin | 0-2-0 REC | #4614 |  |
 | Rodolfo Rubio | 0-1-0 UFC | #6199 | |
 | Rodrigo Brauna | 1-0-0 REC | #4194 | |
 | Rodrigo Damm | 3-4-0 UFC | #3054 |  |
 | Rodrigo Praia | 1-1-0 REC | #4842 | |
 | Rodrigo Vera | 1-0-0 REC | #2910 |  |
 | Roedie Roets | #7449 |  | |
 | Rogelio Luna | 1-1-0 REC | #6392 | |
 | Roger Severson | 0-2-0 REC | #4266 | |
 | Rolando Dy | 1-3-0 UFC | #3608 |  |
 | Roli Delgado | 1-2-0 UFC | #4459 | |
 | Roman Bogatov | 0-1-0 UFC | #7011 | |
 | Roman Ogulchanskiy | 1-1-0 REC | #1550 |  |
 | Roman Puga | 2-0-0 REC | #657 | |
 | Ron Becker | 0-1-0 REC | #7119 |  |
 | Rony Jason | 4-4-0, 1NC UFC | #2564 | |