Poids Légers Hommes
 | Roman Szymanski | 2-4-0 REC | #2342 |  |
 | Roman Zhukov | 0-1-0 REC | #7250 |  |
 | Rongzhu | 4-3-0 UFC | #463 |  |
 | Ronnie Gibbs | 1-0-0 REC | #3188 |  |
 | Ronys Torres | 0-2-0 UFC | #5072 |  |
 | Roosevelt Roberts | 4-5-0, 1NC UFC | #1857 | |
 | Ross Pearson | 12-13-0, 1NC UFC | #699 |  |
 | Rustam Asuev | 1-0-0 REC | #3525 | |
 | Rustam Khabilov | 10-3-0 UFC | #754 | |
 | Ryan Campbell | 3-1-0 REC | #1809 |  |
 | Ryan Couture | 0-2-0 UFC | #4630 | |
 | Ryan Dela Cruz | 0-1-0 REC | #6741 | |
 | Ryan Eren Agbo | 0-2-0 REC | #3489 |  |
 | Ryan Gerena | #8165 | | |
 | Ryan Motley | 1-0-0 REC | #6178 | |
 | Ryan Puttbrese | 1-0-0 REC | #2315 | |
 | Ryan Teixeira | #7863 | | |
 | Ryota Oki | 1-0-0 REC | #2379 |  |
 | Saber Cherifi | #7934 | | |
| Sahel Walizada | 0-1-0 REC | #7979 | |