Poids Légers Hommes
 | Roberto de Souza | 4-3-0 REC | #1618 |  |
 | Robin Frank | 0-1-0 REC | #5243 |  |
 | Robson Junior | 1-0-0 REC | #6343 | |
 | Rodrigo de Lima | 0-2-0 UFC | #4696 | |
 | Rodrigo Lidio | 0-2-0 REC | #5897 | |
 | Rodrigo Paiva | 0-1-0 REC | #6113 | |
 | Rodrigo Vargas | 1-3-0 UFC | #3070 |  |
 | Roger Bowling | 0-2-0, 1NC UFC | #5573 |  |
 | Roland Pruden | 1-1-0 REC | #3267 | |
 | Roland Szolnoki | 1-0-0 REC | #7867 |  |
 | Rolando Bedoya | 0-4-0 UFC | #3133 |  |
 | Roman David | 1-0-0 REC | #2824 |  |
 | Roman Mitichyan | 1-1-0 UFC | #4359 |  |
 | Roman Szymanski | 2-4-0 REC | #2237 |  |
 | Roman Zhukov | 0-1-0 REC | #7056 |  |
 | Rongzhu | 4-3-0 UFC | #394 |  |
 | Ronnie Gibbs | 1-0-0 REC | #3040 | |
 | Ronys Torres | 0-2-0 UFC | #4982 | |
 | Roosevelt Roberts | 4-5-0, 1NC UFC | #1821 | |
 | Ross Pearson | 12-13-0, 1NC UFC | #685 |  |