Poids Lourds Hommes
 | RJ Harris | 1-0-0 REC | #1220 |  |
 | Rob Broughton | 1-2-0 UFC | #4196 |  |
 | Rob MacDonald | 1-2-0 UFC | #3343 |  |
 | Robelis Despaigne | 1-2-0 UFC | #1838 |  |
 | Robert Lucarelli | 0-1-0 UFC | #5636 | |
 | Roberto Traven | 1-1-0 UFC | #4353 |  |
 | Robin Fosum | 2-0-1 REC | #5210 |  |
 | Rodrigo Nascimento | 4-3-0, 1NC UFC | #1150 | |
 | Roger Hollett | 0-2-0 UFC | #4401 | |
 | Rolles Gracie | 0-1-0 UFC | #5900 | |
 | Ron Faircloth | #7090 | | |
 | Ron Waterman | 2-1-1 UFC | #3274 | |
 | Rony Bouzy | 1-2-0 REC | #1486 |  |
 | Roque Martinez | 0-3-0 UFC | #4093 |  |
 | Roy Nelson | 9-10-0 UFC | #738 | |
 | Ruan Potts | 0-3-0 UFC | #4010 |  |
 | Ruben Wolf | 0-2-0 REC | #4483 |  |
 | Ruslan Magomedov | 3-0-0 UFC | #2839 |  |
 | Ruslan Medzhidov | 0-2-0 REC | #3614 |  |
 | Ryan Bader | 15-5-0 UFC | #170 | |