Poids Mi-Moyens Hommes
 | Roan Carneiro | 4-5-0 UFC | #2695 |  |
 | Roan Crocker | 1-0-0 REC | #1447 |  |
 | Rob Kimmons | 3-4-0 UFC | #3057 |  |
 | Robbie Lawler | 15-10-0 UFC | #149 | |
 | Robert Constantin | 0-1-0 REC | #5314 |  |
 | Robert Maciejowski | 0-1-0 REC | #7330 |  |
 | Rodrigo Sezinando | 0-1-0 UFC | #3234 | |
 | Roger Huerta | 6-2-0 UFC | #1937 | |
 | Roger Zapata | 0-1-0 UFC | #6605 | |
 | Romain Debienne | 3-5-0 REC | #590 |  |
 | Roman Faraldo | 2-2-0 REC | #4057 | |
 | Romie Aram | 0-1-0 UFC | #5825 |  |
 | Ron Humphrey | 1-0-0 REC | #2270 | |
 | Ronald Jhun | 0-1-0 UFC | #7033 | |
 | Ronald Paradeiser | 11-5-0 REC | #446 |  |
 | Ronaldo Silva | 0-1-0 REC | #7711 | |
 | Rory MacDonald | 9-4-0 UFC | #538 |  |
 | Ross Houston | #7564 |  | |
 | Ross Pointon | 0-2-0 UFC | #4730 |  |
 | Rostem Akman | 0-2-0 UFC | #3636 |  |