Poids Mouches Hommes
 | Rio Tirto | 0-1-0 REC | #4076 |  |
 | Roberto Sanchez | 1-2-0 UFC | #4264 |  |
 | Rodney Kealohi | 0-1-0 REC | #6348 | |
 | Rodrigo Roldan | 0-1-0 REC | #5805 |  |
 | Roldan Sangcha-an | 0-2-0 UFC | #4835 |  |
 | Romain Tango Ngouodjou | 0-2-0 REC | #1943 |  |
 | Romero dos Reis | 1-1-0 REC | #3735 |  |
 | Ronal Siahaan | 1-2-0 REC | #4050 | |
 | Ronaldo Candido | 0-1-0 REC | #7127 | |
 | Ronaldo Rodriguez | 2-1-0 UFC | #1917 |  |
 | Roque Conceicao | 0-1-0 REC | #5053 | |
 | Roybert Echeverria | 0-1-0 REC | #6300 |  |
 | Ruan Miqueias | #7450 | | |
 | Ruel Panales | 0-2-0 REC | #4063 | |
 | Ruslan Abiltarov | 0-1-0 REC | #6018 |  |
 | Rustam Debishev | 1-0-0 REC | #6416 | |
 | Ryan Benoit | 3-6-0 UFC | #2479 | |
 | Ryan Curtis | 0-1-0 REC | #6853 |  |
 | Ryan Kim | 0-1-0 REC | #7250 |  |
 | Ryoga Arimoto | #7701 |  |