| Fighter | Record | Last Bout |
|---|---|---|
| Rayanne dos Santos | 14-9-0 | 2025-05-31 |
| Reinier de Ridder | 22-4-0 | 2026-08-22 |
| Reuben Duran | 11-7-1 | 2013-03-16 |
| Rick Davis | 3-1-1 | 2006-05-27 |
| Robelis Despaigne | 5-2-0 | 2026-09-19 |
| Robert Drysdale | 7-0-0 (1 NC) | 2014-07-06 |
| Rodrigo Damm | 13-9-0 | 2015-01-03 |
| Rodrigo de Lima | 8-3-1 | 2015-02-14 |
| Roland Delorme | 9-5-0 (1 NC) | 2014-08-23 |
| Rolando Delgado | 11-6-1 | 2009-11-14 |
| Rolando Dy | 9-7-1 (1 NC) | 2018-06-23 |
| Roman Dolidze | 15-6-0 | 2026-08-22 |
| Russell Doane | 15-8-0 | 2018-02-24 |
| Sean Daugherty | 0-2-0 | 1994-03-11 |
| Sedriques Dumas | 10-5-0 (1 NC) | 2026-04-25 |
| Shana Dobson | 4-5-0 | 2021-02-20 |
| Shane del Rosario | 11-2-0 | 2012-12-15 |
| Shanelle Dyer | 8-1-0 | 2026-08-22 |
| Stan Dorsainvil | 6-0-0 | 2026-08-22 |
| TJ Dillashaw | 18-5-0 | 2022-10-22 |
| Tiago dos Santos e Silva | 20-7-2 (1 NC) | 2016-12-09 |
| Todd Duffee | 9-3-0 (1 NC) | 2019-09-14 |
| Tom DeBlass | 9-2-0 | 2012-11-10 |
| Tom Duquesnoy | 16-2-0 (1 NC) | 2018-03-17 |
| Tomasz Drwal | 21-5-1 | 2010-09-15 |
| Tony DeSouza | 11-4-0 | 2007-12-29 |
| Tyler Diamond | 9-1-0 | 2018-07-06 |
| Vanessa Demopoulos | 11-8-0 | 2026-09-26 |
| Viktoriia Dudakova | 8-2-0 | 2025-01-11 |
| Yadier del Valle | 11-1-0 | 2026-08-08 |
| Yorgan De Castro | 6-3-0 | 2021-04-10 |
| Yuneisy Duben | 6-2-0 (1 NC) | 2026-06-06 |