Fighters
| # | Fighter | Division | Status |
|---|
| 281 | Osimkhon RakhmonovACA | Bantamweight | Active |
| 282 | Aleksandar RakicUFC | Light Heavyweight | Active |
| 283 | Dominick ReyesUFC | Light Heavyweight | Active |
| 284 | Artem ReznikovACA | Lightweight | Active |
| 285 | Gillian RobertsonUFC | Strawweight | Active |
| 286 | Gregory RodriguesUFC | Middleweight | Active |
| 287 | Daniel RodriguezUFC | Welterweight | Active |
| 288 | Ernesto RodriguezPFL | Welterweight | Active |
| 289 | Yair RodriguezUFC | Featherweight | Active |
| 290 | Marina RodriguezUFC | Strawweight | Active |
| 291 | Alexandr RomanovPFL | Heavyweight | Active |
| 292 | Raul Rosas Jr.UFC | Bantamweight | Active |
| 293 | Dalton RostaPFL | Middleweight | Active |
| 294 | Khalil Rountree Jr.UFC | Light Heavyweight | Active |
| 295 | Brandon RoyvalUFC | Flyweight | Active |
| 296 | Mauricio RuffyUFC | Lightweight | Active |
| 297 | Arash SadeghiACA | Heavyweight | Active |
| 298 | Benoit Saint DenisUFC | Lightweight | Active |
| 299 | Quillan SalkilldUFC | Lightweight | Active |
| 300 | Cory SandhagenUFC | Bantamweight | Active |