Tous les combattants
 | Ronaldo Silva | 0-1-0 REC | #7754 |  |
 | Ronaldo Souza | 9-7-0 UFC | #990 | |
 | Ronda Rousey | 6-2-0 UFC | #143 |  |
 | Rongzhu | 4-3-0 UFC | #430 |  |
 | Ronnie Gibbs | 1-0-0 REC | #3107 | |
 | Ronnie Lawrence | 2-1-0, 1NC UFC | #3565 | |
 | Ronny Hauser | 0-1-0 REC | #7401 | |
 | Ronny Markes | 3-2-0 UFC | #2608 | |
 | Rony Bouzy | 1-2-0 REC | #2389 |  |
 | Rony Henrique | 1-1-0 REC | #1653 | |
 | Rony Jason | 4-4-0, 1NC UFC | #2547 | |
 | Ronys Torres | 0-2-0 UFC | #5008 | |
 | Roosevelt Roberts | 4-5-0, 1NC UFC | #1833 | |
 | Roque Conceicao | 0-1-0 REC | #5302 | |
 | Roque Martinez | 0-3-0 UFC | #4564 |  |
 | Rory Evans | 2-5-0 REC | #3405 |  |
 | Rory Light | 1-0-0 REC | #7623 | |
 | Rory MacDonald | 9-4-0 UFC | #546 |  |
 | Rory Markham | 1-2-0 UFC | #3996 | |
 | Rory Singer | 2-2-0 UFC | #4103 | |
 | Rose Conceicao | 0-2-0 REC | #4228 | |
 | Rose Namajunas | 12-7-0 UFC | #63 | |
 | Rosi Sexton | 0-2-0 UFC | #4636 |  |
 | Ross Houston | #7704 |  | |
 | Ross Pearson | 12-13-0, 1NC UFC | #682 | |