| Nationality | Name | Wins | Losses |
|---|---|---|---|
| Nationality | Name | Wins | Losses |
| Ukrainian | Tsotne Rogava | 13 | 8 |
| French | Darren Rolland | 19 | 6 |
| Spanish | Abraham Roqueñi | 72 | 11 |
| Dutch | Robin van Roosmalen | 51 | 18 |
| American | Shane del Rosario | 8 | 1 |
| Cambodian | Keo Rumchong | 160 | 13 |
| American | Kevin Rosier | 66 | 8 |
| American | Kevin Ross | 45 | 14 |
| American | Ben Rothwell | 3 | 0 |
| Jeff Roufus | 36 | 8 | |
| Rick Roufus | 65 | 9 | |
| Dutch | Fred Royers | 39 | 4 |
| Jairzinho Rozenstruik | 76 | 8 | |
| Constantin Rusu | 24 | 4 | |
| Bas Rutten | 14 | 2 | |
| Chinese | Wei Rui | 69 | 3 |
| French | Bobo Sacko | 32 | 8 |
| Thai | Kaonar P.K.SaenchaiMuaythaiGym | 140 | 37 |
| Thai | Kongsak Saenchaimuaythaigym | 163 | 60 |
| Muangthai P.K. Saenchaimuaythaigym | 203 | 43 |