Tous les combattants
 | Rory Light | 1-0-0 REC | #7902 |  |
 | Rory MacDonald | 9-4-0 UFC | #581 |  |
 | Rory Markham | 1-2-0 UFC | #4178 | |
 | Rory Singer | 2-2-0 UFC | #4283 | |
 | Rosario Romero | #8300 | | |
 | Rose Conceicao | 0-2-0 REC | #4432 |  |
 | Rose Namajunas | 12-7-0 UFC | #65 | |
 | Rosi Sexton | 0-2-0 UFC | #4855 |  |
 | Ross Houston | #7900 |  | |
 | Ross Pearson | 12-13-0, 1NC UFC | #709 | |
 | Ross Pointon | 0-2-0 UFC | #5249 | |
 | Rostem Akman | 0-2-0 UFC | #3812 |  |
 | Rostislav Yakushev | 0-1-0 REC | #7122 |  |
 | Rousimar Palhares | 8-4-0 UFC | #1168 | |
 | Roxanne Modafferi | 4-8-0 UFC | #2045 | |
 | Roy Nelson | 9-10-0 UFC | #826 | |
 | Roybert Echeverria | 0-1-0 REC | #6922 |  |
 | Royce Alger | 0-2-0 UFC | #5179 | |
 | Royce Gracie | 11-1-1 UFC | #467 | |
 | Royston Wee | 2-1-0 UFC | #4144 |  |
 | Roza Gumienna | 1-3-0 REC | #4860 |  |
 | Ruan Miqueias | #8058 | | |
 | Ruan Potts | 0-3-0 UFC | #4495 |  |
 | Ruben Vinci | #8249 |  | |
 | Ruben Wolf | 0-2-0 REC | #5513 |  |