Combattants Etats-Unis
| 2051 |  | Roberto Sanchez | 1-2-0 UFC | #4391 |  |
| 2052 |  | Rodney Kealohi | 0-1-0 REC | #6534 | |
| 2053 |  | Rodney Wallace | 0-3-0 UFC | #4857 | |
| 2054 |  | Rodrigo Brauna | 2-0-0 REC | #696 | |
| 2055 |  | Rogelio Luna | 1-1-0 REC | #6522 | |
| 2056 |  | Roger Bowling | 0-2-0, 1NC UFC | #5444 | |
| 2057 |  | Roger Huerta | 6-2-0 UFC | #1912 | |
| 2058 |  | Roger Narvaez | 1-2-0 UFC | #3779 | |
| 2059 |  | Roger Severson | 0-2-0 REC | #4526 | |
| 2060 |  | Roger Zapata | 0-1-0 UFC | #6697 | |
| 2061 |  | Roland Dunlap | 1-0-0 REC | #7286 | |
| 2062 |  | Roland Payne | 0-1-0 UFC | #4709 | |
| 2063 |  | Roland Pruden | 1-1-0 REC | #3090 | |
| 2064 |  | Roli Delgado | 1-2-0 UFC | #4605 | |
| 2065 |  | Roman Faraldo | 2-2-0 REC | #3984 | |
| 2066 |  | Roman Puga | 2-0-0 REC | #1023 | |
| 2067 |  | Roman Salazar | 0-2-0, 1NC UFC | #3736 | |
| 2068 |  | Romero Cotton | 1-2-0 REC | #5314 | |
| 2069 |  | Ron Faircloth | #7400 | | |
| 2070 |  | Ron Humphrey | 1-0-0 REC | #2158 | |
| 2071 |  | Ron Stallings | 1-2-0 UFC | #3827 | |
| 2072 |  | Ron Van Clief | 0-1-0 UFC | #4674 | |
| 2073 |  | Ron Waterman | 2-1-1 UFC | #3525 | |
| 2074 |  | Ronald Jhun | 0-1-0 UFC | #7009 | |
| 2075 |  | Ronda Rousey | 6-2-0 UFC | #110 | |