Poids Mi-Moyens Hommes
 | Robbie Lawler | 15-10-0 UFC | #165 |  |
 | Robert Constantin | 0-1-0 REC | #5408 |  |
 | Robert Maciejowski | 0-1-0 REC | #7561 |  |
 | Roberto Soldic | #7977 |  | |
 | Rodrigo Sezinando | 0-1-0 UFC | #3238 |  |
 | Roger Huerta | 6-2-0 UFC | #1980 | |
 | Roger Zapata | 0-1-0 UFC | #6897 | |
 | Romain Debienne | 3-5-0 REC | #951 |  |
 | Roman Faraldo | 2-2-0 REC | #4290 | |
 | Romie Aram | 0-1-0 UFC | #6129 |  |
 | Ron Humphrey | 2-0-0 REC | #426 | |
 | Ronald Jhun | 0-1-0 UFC | #7309 | |
 | Ronald Paradeiser | 11-5-0 REC | #549 |  |
 | Ronaldo Silva | 0-1-0 REC | #7788 | |
 | Rory MacDonald | 9-4-0 UFC | #553 |  |
 | Ross Houston | #7813 |  | |
 | Ross Pointon | 0-2-0 UFC | #5071 |  |
 | Rostem Akman | 0-2-0 UFC | #3771 |  |
 | Rousimar Palhares | 8-4-0 UFC | #1139 | |
 | Rudy Delangue | #8181 | |