| Fighter | Record | Last Bout |
|---|---|---|
| Denis Kang | 35-16-2 (2 NC) | 2009-11-14 |
| Denis Stojnic | 13-3-0 (1 NC) | 2009-06-13 |
| Denis Tiuliulin | 10-10-0 (1 NC) | 2024-08-03 |
| Denise Gomes | 13-3-0 | 2026-08-29 |
| Dennis Bermudez | 17-9-0 | 2019-01-19 |
| Dennis Buzukja | 12-7-0 | 2026-08-01 |
| Dennis Hallman | 53-20-2 (1 NC) | 2011-12-10 |
| Dennis Siver | 23-11-0 (1 NC) | 2017-06-25 |
| Denys Bondar | 14-5-0 | 2024-02-24 |
| Denzel Freeman | 7-2-0 | 2026-01-24 |
| Dequan Townsend | 21-12-0 | 2020-10-03 |
| Derek Brunson | 23-9-0 | 2023-03-04 |
| Derek Downey | 11-4-0 | 2009-02-07 |
| Deron Winn | 7-3-0 | 2022-06-18 |
| Derrick Krantz | 22-12-0 | 2019-08-31 |
| Derrick Lewis | 29-14-0 (1 NC) | 2026-06-14 |
| Derrick Noble | 27-15-1 | 2006-04-15 |
| Desmond Green | 23-8-0 | 2019-05-18 |
| Devin Clark | 14-9-0 | 2024-02-10 |
| Devin Powell | 9-4-0 | 2018-11-17 |
| Devonte Smith | 11-4-0 | 2022-03-05 |
| Dhiego Lima | 17-9-0 | 2021-06-19 |
| Diana Belbita | 15-10-0 | 2025-04-05 |
| Diego Brandao | 22-11-0 | 2016-01-02 |
| Diego Ferreira | 20-7-0 | 2026-08-08 |
| Diego Lopes | 28-8-0 | 2026-06-14 |
| Diego Nunes | 19-7-0 | 2013-01-19 |
| Diego Rivas | 10-2-0 | 2018-05-19 |
| Diego Sanchez | 31-13-0 | 2020-09-26 |
| Diego Saraiva | 22-20-1 | 2007-09-22 |
| Dieusel Berto | 0-3-0 | 1996-07-12 |
| Dileno Lopes | 19-3-0 | 2016-07-07 |
| Din Thomas | 26-9-0 (1 NC) | 2008-04-02 |
| Ding Meng | 35-11-0 | 2026-08-29 |
| Dione Barbosa | 10-4-0 | 2026-07-18 |
| Diyar Nurgozhay | 12-2-0 | 2026-08-08 |
| Djorden Santos | 11-3-0 | 2026-09-12 |
| Dmitri Stepanov | 0-1-0 | 1997-05-30 |
| Dmitrii Smoliakov | 9-3-0 | 2019-04-27 |
| Dmitry Sosnovskiy | 11-0-0 | 2018-03-17 |
| Dokonjonosuke Mishima | 21-7-2 | 2007-04-05 |
| Dom Mar Fan | 9-3-0 | 2026-05-02 |
| Domingo Pilarte | 8-3-0 (1 NC) | 2021-08-21 |
| Dominic Waters | 9-5-0 | 2016-05-08 |
| Dominick Cruz | 24-4-0 | 2022-08-13 |
| Dominick Reyes | 16-5-0 | 2026-10-24 |
| Dominique Steele | 14-9-0 | 2017-06-10 |
| Don Frye | 20-9-1 (1 NC) | 1996-12-07 |
| Don Madge | 9-3-1 | 2019-09-07 |
| Don Shainis | 12-5-0 | 2023-02-11 |