Combattants Etats-Unis
| 2051 |  | Ronda Rousey | 6-2-0 UFC | #204 |  |
| 2052 |  | Ronnie Gibbs | 1-0-0 REC | #2399 | |
| 2053 |  | Ronnie Lawrence | 2-1-0, 1NC UFC | #3340 | |
| 2054 |  | Ronny Hauser | 0-1-0 REC | #6993 | |
| 2055 |  | Roosevelt Roberts | 4-5-0, 1NC UFC | #1674 | |
| 2056 |  | Rory Light | 1-0-0 REC | #7215 | |
| 2057 |  | Rory Markham | 1-2-0 UFC | #3727 | |
| 2058 |  | Rory Singer | 2-2-0 UFC | #3815 | |
| 2059 |  | Rose Namajunas | 12-7-0 UFC | #72 | |
| 2060 |  | Roxanne Modafferi | 4-8-0 UFC | #1966 | |
| 2061 |  | Roy Nelson | 9-10-0 UFC | #806 | |
| 2062 |  | Royce Alger | 0-2-0 UFC | #4580 | |
| 2063 |  | Rudyard Moncayo | 0-1-0 UFC | #6450 | |
| 2064 |  | Russell Doane | 3-5-0 UFC | #2814 | |
| 2065 |  | Ryan Bader | 15-5-0 UFC | #175 | |
| 2066 |  | Ryan Benoit | 3-6-0 UFC | #2479 | |
| 2067 |  | Ryan Cafaro | #7695 | | |
| 2068 |  | Ryan Charlebois | 0-1-0 REC | #6451 | |
| 2069 |  | Ryan Couture | 0-2-0 UFC | #4337 | |
| 2070 |  | Ryan Dela Cruz | 0-1-0 REC | #6506 | |
| 2071 |  | Ryan Firinaiu | 1-0-0 REC | #1034 | |
| 2072 |  | Ryan Hall | 5-1-0 UFC | #1064 | |
| 2073 |  | Ryan Jensen | 2-6-0 UFC | #2948 | |
| 2074 |  | Ryan Kuse | 1-0-0 REC | #2340 | |
| 2075 |  | Ryan Laflare | 7-3-0 UFC | #1637 | |