Poids Légers Hommes
 | Robert Watley | 2-3-0 REC | #1951 |  |
 | Roberto de Souza | 4-3-0 REC | #1490 |  |
 | Robin Frank | 0-1-0 REC | #5208 |  |
 | Robson Junior | 1-0-0 REC | #6533 | |
 | Rodrigo de Lima | 0-2-0 UFC | #4611 | |
 | Rodrigo Lidio | 0-2-0 REC | #5619 | |
 | Rodrigo Paiva | 0-1-0 REC | #6039 | |
 | Rodrigo Vargas | 1-3-0 UFC | #3094 |  |
 | Roger Bowling | 0-2-0, 1NC UFC | #5480 | |
 | Roland Pruden | 1-1-0 REC | #3138 | |
 | Roland Szolnoki | 1-0-0 REC | #7769 |  |
 | Rolando Bedoya | 0-4-0 UFC | #3013 |  |
 | Roman David | 1-0-0 REC | #2616 |  |
 | Roman Mitichyan | 1-1-0 UFC | #4293 |  |
 | Roman Szymanski | 2-4-0 REC | #2073 |  |
 | Roman Zhukov | 0-1-0 REC | #6948 |  |
 | Rongzhu | 4-3-0 UFC | #287 |  |
 | Ronnie Gibbs | 1-0-0 REC | #2806 | |
 | Ronys Torres | 0-2-0 UFC | #4928 | |
 | Roosevelt Roberts | 4-5-0, 1NC UFC | #1783 | |