Combattants Etats-Unis
| 2051 |  | Roberto Sanchez | 1-2-0 UFC | #4374 |  |
| 2052 |  | Rodney Kealohi | 0-1-0 REC | #6525 | |
| 2053 |  | Rodney Wallace | 0-3-0 UFC | #4831 | |
| 2054 |  | Rodrigo Brauna | 2-0-0 REC | #655 | |
| 2055 |  | Rogelio Luna | 1-1-0 REC | #6488 | |
| 2056 |  | Roger Bowling | 0-2-0, 1NC UFC | #5410 | |
| 2057 |  | Roger Huerta | 6-2-0 UFC | #1899 | |
| 2058 |  | Roger Narvaez | 1-2-0 UFC | #3757 | |
| 2059 |  | Roger Severson | 0-2-0 REC | #4478 | |
| 2060 |  | Roger Zapata | 0-1-0 UFC | #6661 | |
| 2061 |  | Roland Dunlap | 1-0-0 REC | #7252 | |
| 2062 |  | Roland Payne | 0-1-0 UFC | #4667 | |
| 2063 |  | Roland Pruden | 1-1-0 REC | #3059 | |
| 2064 |  | Roli Delgado | 1-2-0 UFC | #4591 | |
| 2065 |  | Roman Faraldo | 2-2-0 REC | #3955 | |
| 2066 |  | Roman Puga | 2-0-0 REC | #964 | |
| 2067 |  | Roman Salazar | 0-2-0, 1NC UFC | #3721 | |
| 2068 |  | Romero Cotton | 1-2-0 REC | #5296 | |
| 2069 |  | Ron Faircloth | #7404 | | |
| 2070 |  | Ron Humphrey | 1-0-0 REC | #2112 | |
| 2071 |  | Ron Stallings | 1-2-0 UFC | #3812 | |
| 2072 |  | Ron Van Clief | 0-1-0 UFC | #4664 | |
| 2073 |  | Ron Waterman | 2-1-1 UFC | #3503 | |
| 2074 |  | Ronald Jhun | 0-1-0 UFC | #6986 | |
| 2075 |  | Ronda Rousey | 6-2-0 UFC | #105 | |