| Fighter | Record | Last Bout |
|---|---|---|
| Mac Danzig | 21-12-1 | 2013-12-14 |
| Marc Diakiese | 17-7-0 | 2023-11-04 |
| Marcos Rogerio de Lima | 22-10-1 | 2024-02-17 |
| Marcus Davis | 22-11-0 (1 NC) | 2011-01-01 |
| Mark De La Rosa | 11-5-0 | 2020-06-13 |
| Martin Day | 8-6-0 | 2021-02-06 |
| Matt Dwyer | 9-4-0 | 2016-01-30 |
| Mike de la Torre | 14-7-0 (1 NC) | 2017-04-08 |
| Milana Dudieva | 11-6-0 | 2016-11-19 |
| Montana De La Rosa | 13-9-1 | 2024-06-08 |
| Nate Diaz | 22-13-0 | 2022-09-10 |
| Nick Denis | 11-3-0 | 2012-05-05 |
| Nick Diaz | 26-10-0 (2 NC) | 2021-09-25 |
| Paul Daley | 39-15-2 | 2010-05-08 |
| Phil Davis | 17-4-0 (1 NC) | 2015-01-24 |
| Philip De Fries | 12-6-0 (1 NC) | 2013-04-06 |
| Reuben Duran | 11-7-1 | 2013-03-16 |
| Rick Davis | 3-1-1 | 2006-05-27 |
| 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 |
| Russell Doane | 15-8-0 | 2018-02-24 |
| Sean Daugherty | 0-2-0 | 1994-03-11 |
| Shana Dobson | 4-5-0 | 2021-02-20 |
| Shane del Rosario | 11-2-0 | 2012-12-15 |
| 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 |
| Yorgan De Castro | 6-3-0 | 2021-04-10 |