Poids Mi-Moyens Hommes
 | Romain Debienne | 3-5-0 REC | #527 |  |
 | Roman Faraldo | 2-2-0 REC | #4022 |  |
 | Romie Aram | 0-1-0 UFC | #5885 |  |
 | Ron Humphrey | 1-0-0 REC | #2214 | |
 | Ronald Jhun | 0-1-0 UFC | #7048 | |
 | Ronald Paradeiser | 11-5-0 REC | #438 |  |
 | Ronaldo Silva | 0-1-0 REC | #7711 |  |
 | Rory MacDonald | 9-4-0 UFC | #551 |  |
 | Ross Houston | #7534 |  | |
 | Ross Pointon | 0-2-0 UFC | #4669 |  |
 | Rostem Akman | 0-2-0 UFC | #3615 |  |
 | Rousimar Palhares | 8-4-0 UFC | #1136 | |
 | Rudy Delangue | #7929 | | |
 | Ruslan Kolodko | 0-2-0 REC | #3536 |  |
 | Rustam Khadisgadzhiev | 2-0-0 REC | #2087 |  |
 | Rustam Serbiev | 0-1-0 REC | #5414 | |
 | Ryan Charlebois | 0-1-0 REC | #6350 | |
 | Ryan Laflare | 7-3-0 UFC | #1744 | |
 | Ryan Madigan | 0-1-0 UFC | #5488 | |
 | Ryan McGillivray | 0-1-0 UFC | #5740 | |