Tous les combattants
 | Roman Mitichyan | 1-1-0 UFC | #4298 |  |
 | Roman Ogulchanskiy | 1-1-0 REC | #2031 |  |
 | Roman Paulus | 9-5-0 REC | #1412 |  |
 | Roman Puga | 2-0-0 REC | #1214 |  |
 | Roman Salazar | 0-2-0, 1NC UFC | #3832 | |
 | Roman Szymanski | 2-4-0 REC | #2134 |  |
 | Roman Zhukov | 0-1-0 REC | #6895 |  |
 | Romero Cotton | 1-2-0 REC | #5476 | |
 | Romero dos Reis | 1-1-0 REC | #3911 |  |
 | Romie Aram | 0-1-0 UFC | #5810 |  |
 | Romulo Oliveira | #8054 | | |
 | Ron Becker | 0-1-0 REC | #7419 |  |
 | Ron Faircloth | #7414 | | |
 | Ron Humphrey | 1-0-0 REC | #2300 | |
 | Ron Stallings | 1-2-0 UFC | #3903 | |
 | Ron Van Clief | 0-1-0 UFC | #4736 | |
 | Ron Waterman | 2-1-1 UFC | #3609 | |
 | Ronal Siahaan | 1-2-0 REC | #4260 |  |
 | Ronald Jhun | 0-1-0 UFC | #7031 | |
 | Ronald Paradeiser | 11-5-0 REC | #449 | |
 | Ronaldo Candido | 0-1-0 REC | #7418 | |
 | Ronaldo Rodriguez | 2-1-0 UFC | #2128 |  |
 | Ronaldo Silva | 0-1-0 REC | #7738 | |
 | Ronaldo Souza | 9-7-0 UFC | #970 | |
 | Ronda Rousey | 6-2-0 UFC | #126 | |