| Fighter | Record | Last Bout |
|---|---|---|
| AJ Dobson | 7-3-0 (1 NC) | 2024-03-23 |
| Aisling Daly | 16-6-0 | 2015-10-24 |
| Albert Duraev | 16-5-0 | 2023-07-15 |
| Alessio Di Chirico | 13-7-0 | 2022-09-03 |
| Alex Da Silva | 21-4-0 | 2022-06-04 |
| Alexandre Dantas | 0-3-0 | 2003-02-28 |
| Alexis Davis | 21-11-0 | 2022-02-05 |
| Alexis Dufresne | 6-3-0 | 2015-01-03 |
| Anderson Dos Santos | 21-9-0 | 2021-08-07 |
| Antonio Dos Santos | 6-4-0 | 2015-06-20 |
| Batgerel Danaa | 12-5-0 | 2023-04-22 |
| Blood Diamond | 3-3-0 | 2023-09-09 |
| Brandon Davis | 14-10-0 | 2022-10-15 |
| CB Dollaway | 17-9-0 | 2018-09-15 |
| Cameron Dollar | 11-5-0 | 2009-06-20 |
| Carl Deaton | 17-7-0 (2 NC) | 2023-07-15 |
| Carls John De Tomas | 6-2-0 | 2017-12-09 |
| Chris Daukaus | 12-7-0 | 2023-08-12 |
| Chris Dempsey | 11-5-0 | 2016-02-27 |
| Chris de la Rocha | 5-3-0 | 2018-12-15 |
| Cindy Dandois | 8-3-0 | 2017-04-22 |
| Cody Donovan | 8-5-0 | 2014-07-19 |
| Cyrille Diabate | 19-10-1 | 2014-03-08 |
| DaMarques Johnson | 15-15-0 | 2012-09-29 |
| Daichi Abe | 6-2-0 | 2018-06-23 |
| Daiju Takase | 12-15-2 | 2000-12-16 |
| Dakota Bush | 8-4-0 | 2022-01-15 |
| Dalcha Lungiambula | 11-6-0 | 2022-12-10 |
| Dale Hartt | 6-3-0 | 2009-06-13 |
| Damacio Page | 19-10-0 | 2012-07-11 |
| Damian Grabowski | 20-5-0 | 2017-07-22 |
| Damian Stasiak | 10-6-0 | 2018-07-22 |
| Damien Brown | 17-12-0 | 2018-02-10 |
| Damir Ismagulov | 24-3-0 | 2023-07-01 |
| Dan Barrera | 3-1-0 | 2007-12-08 |
| Dan Bobish | 17-9-0 | 1997-07-27 |
| Dan Christison | 20-7-0 | 2006-07-08 |
| Dan Cramer | 11-4-0 | 2009-08-08 |
| Dan Evensen | 11-4-0 | 2008-12-27 |
| Dan Hardy | 25-10-0 (1 NC) | 2012-09-29 |
| Dan Henderson | 32-15-0 | 2016-10-08 |
| Dan Lauzon | 17-6-0 | 2010-05-29 |
| Dan Miller | 14-8-0 (1 NC) | 2015-07-12 |
| Dan Moret | 13-6-0 | 2019-06-29 |
| Dan Severn | 101-19-1 | 2000-09-22 |
| Dan Stittgen | 12-5-0 | 2012-07-11 |
| Daniel Cormier | 22-3-0 (1 NC) | 2020-08-15 |
| Daniel Jolly | 5-3-0 | 2017-02-04 |
| Daniel Kelly | 13-4-0 | 2018-05-27 |
| Daniel Lacerda | 11-6-0 (1 NC) | 2024-02-24 |