| Fighter | Record | Last Bout |
|---|---|---|
| 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 |
| Don'Tale Mayes | 11-9-0 (1 NC) | 2025-05-03 |
| Donald Cerrone | 36-17-0 (2 NC) | 2022-07-02 |
| Dong Hyun Kim | 22-4-1 (1 NC) | 2017-06-17 |
| Dong Hyun Ma | 16-11-3 | 2019-12-21 |
| DongHun Choi | 9-0-0 | 2024-11-23 |
| Dongi Yang | 13-3-0 | 2015-11-28 |
| Donnie Chappell | 0-1-0 | 1997-07-27 |
| Donny Walker | 15-10-0 | 2011-09-17 |
| Donte Johnson | 9-0-0 | 2026-08-15 |
| Dooho Choi | 17-4-1 | 2026-09-19 |
| Dorian Price | 8-5-0 | 2007-12-08 |
| Doug Evans | 13-10-0 | 2007-12-29 |
| Douglas Silva de Andrade | 29-7-0 (1 NC) | 2026-02-28 |
| Drakkar Klose | 16-3-1 | 2026-09-12 |
| Drako Rodriguez | 7-3-0 | 2021-08-07 |
| Drew Dober | 29-15-0 (1 NC) | 2026-03-07 |
| Drew Fickett | 42-21-0 | 2007-04-05 |
| Drew McFedries | 12-7-0 | 2009-09-19 |
| Dricus Du Plessis | 24-3-0 | 2026-07-18 |