Combattants Etats-Unis
| 2076 |  | Roli Delgado | 1-2-0 UFC | #4635 |  |
| 2077 |  | Roman Faraldo | 2-2-0 REC | #4057 | |
| 2078 |  | Roman Puga | 2-0-0 REC | #1169 | |
| 2079 |  | Roman Salazar | 0-2-0, 1NC UFC | #3813 | |
| 2080 |  | Romero Cotton | 1-2-0 REC | #5434 | |
| 2081 |  | Ron Faircloth | #7400 | | |
| 2082 |  | Ron Humphrey | 1-0-0 REC | #2270 | |
| 2083 |  | Ron Stallings | 1-2-0 UFC | #3882 | |
| 2084 |  | Ron Van Clief | 0-1-0 UFC | #4718 | |
| 2085 |  | Ron Waterman | 2-1-1 UFC | #3589 | |
| 2086 |  | Ronald Jhun | 0-1-0 UFC | #7033 | |
| 2087 |  | Ronda Rousey | 6-2-0 UFC | #122 | |
| 2088 |  | Ronnie Gibbs | 1-0-0 REC | #2856 | |
| 2089 |  | Ronnie Lawrence | 2-1-0, 1NC UFC | #3497 | |
| 2090 |  | Ronny Hauser | 0-1-0 REC | #7282 | |
| 2091 |  | Roosevelt Roberts | 4-5-0, 1NC UFC | #1766 | |
| 2092 |  | Rory Light | 1-0-0 REC | #7423 | |
| 2093 |  | Rory Markham | 1-2-0 UFC | #3875 | |
| 2094 |  | Rory Singer | 2-2-0 UFC | #3995 | |
| 2095 |  | Rose Namajunas | 12-7-0 UFC | #60 | |
| 2096 |  | Roxanne Modafferi | 4-8-0 UFC | #2013 | |
| 2097 |  | Roy Nelson | 9-10-0 UFC | #796 | |
| 2098 |  | Royce Alger | 0-2-0 UFC | #4854 | |
| 2099 |  | Rudyard Moncayo | 0-1-0 UFC | #6813 | |
| 2100 |  | Russell Doane | 3-5-0 UFC | #2977 | |