Tous les combattants
 | Rony Henrique | 1-1-0 REC | #1571 |  |
 | Rony Jason | 4-4-0, 1NC UFC | #2555 | |
 | Ronys Torres | 0-2-0 UFC | #4982 | |
 | Roosevelt Roberts | 4-5-0, 1NC UFC | #1821 |  |
 | Roque Conceicao | 0-1-0 REC | #5305 | |
 | Roque Martinez | 0-3-0 UFC | #4519 |  |
 | Rory Evans | 2-5-0 REC | #3390 |  |
 | Rory Light | 1-0-0 REC | #7591 | |
 | Rory MacDonald | 9-4-0 UFC | #534 |  |
 | Rory Markham | 1-2-0 UFC | #3964 | |
 | Rory Singer | 2-2-0 UFC | #4102 | |
 | Rose Conceicao | 0-2-0 REC | #4205 | |
 | Rose Namajunas | 12-7-0 UFC | #63 | |
 | Rosi Sexton | 0-2-0 UFC | #4599 |  |
 | Ross Houston | #7692 |  | |
 | Ross Pearson | 12-13-0, 1NC UFC | #685 | |
 | Ross Pointon | 0-2-0 UFC | #4863 | |
 | Rostem Akman | 0-2-0 UFC | #3665 |  |
 | Rostislav Yakushev | 0-1-0 REC | #7152 |  |
 | Rousimar Palhares | 8-4-0 UFC | #1137 | |
 | Roxanne Modafferi | 4-8-0 UFC | #2040 | |
 | Roy Nelson | 9-10-0 UFC | #784 | |
 | Roybert Echeverria | 0-1-0 REC | #6723 |  |
 | Royce Alger | 0-2-0 UFC | #4969 | |
 | Royce Gracie | 11-1-1 UFC | #434 | |