Poids Légers Hommes
 | Robert Watley | 2-3-0 REC | #1627 |  |
 | Roberto de Souza | 4-3-0 REC | #1198 |  |
 | Robin Frank | 0-1-0 REC | #5162 |  |
 | Robson Junior | 1-0-0 REC | #6699 | |
 | Rodrigo de Lima | 0-2-0 UFC | #4448 | |
 | Rodrigo Lidio | 0-2-0 REC | #5482 | |
 | Rodrigo Paiva | 0-1-0 REC | #5782 | |
 | Rodrigo Vargas | 1-3-0 UFC | #3006 |  |
 | Roger Bowling | 0-2-0, 1NC UFC | #5246 | |
 | Roland Pruden | 1-1-0 REC | #2923 | |
 | Roland Szolnoki | 1-0-0 REC | #7533 |  |
 | Rolando Bedoya | 0-4-0 UFC | #2834 |  |
 | Roman David | 1-0-0 REC | #2244 |  |
 | Roman Mitichyan | 1-1-0 UFC | #4158 |  |
 | Roman Szymanski | 2-3-0 REC | #2028 |  |
 | Roman Zhukov | 0-1-0 REC | #6600 |  |
 | Ronnie Gibbs | 1-0-0 REC | #2434 | |
 | Ronys Torres | 0-2-0 UFC | #4702 | |
 | Roosevelt Roberts | 4-5-0, 1NC UFC | #1667 | |
 | Ross Pearson | 12-13-0, 1NC UFC | #670 |  |