Tous les combattants
 | Roman Zhukov | 0-1-0 REC | #7056 |  |
 | Romero Cotton | 1-2-0 REC | #5546 |  |
 | Romero dos Reis | 1-1-0 REC | #3996 |  |
 | Romie Aram | 0-1-0 UFC | #5913 |  |
 | Romulo Oliveira | 0-1-0 REC | #6743 | |
 | Ron Becker | 0-1-0 REC | #7423 |  |
 | Ron Faircloth | #7483 | | |
 | Ron Humphrey | 1-0-0 REC | #2401 | |
 | Ron Stallings | 1-2-0 UFC | #3971 | |
 | Ron Van Clief | 0-1-0 UFC | #4754 | |
 | Ron Waterman | 2-1-1 UFC | #3652 | |
 | Ronal Siahaan | 1-2-0 REC | #4326 |  |
 | Ronald Jhun | 0-1-0 UFC | #7171 | |
 | Ronald Paradeiser | 11-5-0 REC | #486 |  |
 | Ronaldo Candido | 0-1-0 REC | #7478 | |
 | Ronaldo Rodriguez | 2-1-0 UFC | #2193 |  |
 | Ronaldo Silva | 0-1-0 REC | #7767 | |
 | Ronaldo Souza | 9-7-0 UFC | #986 | |
 | Ronda Rousey | 6-2-0 UFC | #138 | |
 | Rongzhu | 4-3-0 UFC | #394 |  |
 | Ronnie Gibbs | 1-0-0 REC | #3040 | |
 | Ronnie Lawrence | 2-1-0, 1NC UFC | #3552 | |
 | Ronny Hauser | 0-1-0 REC | #7405 | |
 | Ronny Markes | 3-2-0 UFC | #2610 | |
 | Rony Bouzy | 1-2-0 REC | #2330 |  |