| Fighter | Record | Last Bout |
|---|---|---|
| Ravena Oliveira | 7-5-1 | 2026-08-08 |
| Rayanne dos Santos | 14-9-0 | 2025-05-31 |
| Regina Tarin | 8-0-0 | 2026-09-12 |
| Rei Tsuruya | 12-1-0 | 2026-08-29 |
| Reinier de Ridder | 22-4-0 | 2026-08-22 |
| Renato Moicano | 21-7-1 | 2026-09-19 |
| Rhys McKee | 14-7-1 | 2025-09-06 |
| Ricardo Ramos | 17-8-0 | 2025-10-11 |
| Richie Miranda | 13-2-0 | 2026-08-08 |
| Ricky Simon | 22-7-1 | 2026-09-26 |
| Ricky Turcios | 13-6-0 | 2026-03-07 |
| Rinat Fakhretdinov | 24-1-1 | 2025-09-06 |
| Rinya Nakamura | 10-1-0 | 2026-09-26 |
| Rizvan Kuniev | 14-3-1 (1 NC) | 2026-10-24 |
| RJ Harris | 6-0-0 | 2026-07-18 |
| Rob Font | 22-10-0 | 2026-03-07 |
| Robelis Despaigne | 5-2-0 | 2026-09-19 |
| Robert Bryczek | 18-7-0 | 2026-09-26 |
| Robert Ruchala | 11-3-0 | 2026-04-04 |
| Robert Valentin | 13-6-0 (1 NC) | 2026-08-01 |
| Robert Whittaker | 28-9-0 | 2026-07-11 |
| Roberto Romero | 8-5-1 | 2025-04-26 |
| Roberto Soldic | 21-4-0 | 2026-10-03 |
| Rodolfo Bellato | 13-3-1 (1 NC) | 2026-09-26 |
| Rodolfo Vieira | 11-5-0 | 2026-09-26 |
| Rodrigo Nascimento | 11-3-0 (1 NC) | 2024-11-02 |
| Rodrigo Sezinando | 9-2-0 | 2025-09-13 |
| Rodrigo Vera | 22-1-1 | 2026-05-30 |
| Rolando Bedoya | 14-5-0 | 2025-09-27 |
| Roman Dolidze | 15-6-0 | 2026-08-22 |
| Roman Kopylov | 15-5-0 | 2026-10-03 |
| Ronaldo Rodriguez | 17-3-0 | 2025-03-29 |
| Rongzhu | 28-6-0 | 2026-09-12 |
| Roosevelt Roberts | 12-6-0 (1 NC) | 2024-09-28 |
| Rose Namajunas | 15-8-0 | 2026-01-24 |
| Ryan Gandra | 10-1-0 | 2026-09-19 |
| Ryan Kuse | 9-3-0 | 2026-08-22 |
| Ryan Loder | 8-3-0 | 2025-11-22 |
| Ryan Spann | 24-12-0 | 2026-09-05 |
| Said Nurmagomedov | 18-5-0 | 2025-07-26 |
| Saimon Oliveira | 18-7-0 | 2025-10-11 |
| Salahdine Parnasse | 24-2-0 | 2026-09-05 |
| Sam Hughes | 11-7-0 | 2026-03-14 |
| Sam Patterson | 15-3-1 | 2026-07-25 |
| Sangwook Kim | 13-4-0 | 2026-01-31 |
| Santiago Luna | 8-1-0 | 2026-06-06 |
| Santiago Ponzinibbio | 31-10-0 | 2026-07-25 |
| Saygid Izagakhmaev | 22-4-0 | 2026-07-25 |
| Sean Brady | 19-2-0 | 2026-11-07 |
| Sean King III | 6-0-0 | 2026-09-12 |