Tous les combattants
 | Ronys Torres | 0-2-0 UFC | #4928 |  |
 | Roosevelt Roberts | 4-5-0, 1NC UFC | #1783 |  |
 | Roque Conceicao | 0-1-0 REC | #5349 | |
 | Roque Martinez | 0-3-0 UFC | #4522 |  |
 | Rory Evans | 2-5-0 REC | #3352 |  |
 | Rory Light | 1-0-0 REC | #7426 | |
 | Rory MacDonald | 9-4-0 UFC | #549 |  |
 | Rory Markham | 1-2-0 UFC | #3879 | |
 | Rory Singer | 2-2-0 UFC | #3997 | |
 | Rose Conceicao | 0-2-0 REC | #4099 | |
 | Rose Namajunas | 12-7-0 UFC | #62 | |
 | Rosi Sexton | 0-2-0 UFC | #4508 |  |
 | Ross Houston | #7546 |  | |
 | Ross Pearson | 12-13-0, 1NC UFC | #694 | |
 | Ross Pointon | 0-2-0 UFC | #4703 | |
 | Rostem Akman | 0-2-0 UFC | #3631 |  |
 | Rostislav Yakushev | #8086 |  | |
 | Rousimar Palhares | 8-4-0 UFC | #1138 | |
 | Roxanne Modafferi | 4-8-0 UFC | #2032 | |
 | Roy Nelson | 9-10-0 UFC | #810 | |
 | Roybert Echeverria | 0-1-0 REC | #6703 |  |
 | Royce Alger | 0-2-0 UFC | #4838 | |
 | Royce Gracie | 11-1-1 UFC | #437 | |
 | Royston Wee | 2-1-0 UFC | #3816 |  |
 | Roza Gumienna | 1-3-0 REC | #4426 |  |