| Fighter | Record | Last Bout |
|---|---|---|
| Isaac Dulgarian | 7-2-0 | 2025-11-01 |
| Isabela de Padua | 5-2-0 | 2019-11-16 |
| Islam Dulatov | 12-1-0 | 2025-07-19 |
| Jack Della Maddalena | 18-4-0 | 2026-05-02 |
| Jarjis Danho | 7-1-1 (1 NC) | 2021-04-10 |
| Jason Day | 19-12-0 | 2009-03-07 |
| Jason DeLucia | 33-21-1 | 1999-11-19 |
| Jason Dent | 22-13-0 | 2009-11-21 |
| Jessamyn Duke | 3-5-0 (1 NC) | 2015-07-25 |
| Jhonata Diniz | 9-2-0 | 2026-10-17 |
| Joe Doerksen | 51-16-0 | 2010-12-11 |
| Joe Duffy | 16-5-0 | 2020-07-18 |
| John Dodson | 22-12-0 | 2020-08-15 |
| John Dowdy | 0-1-0 | 1995-04-07 |
| Jon Delos Reyes | 8-5-0 | 2015-10-24 |
| Jorge de Oliveira | 9-2-0 | 2015-03-21 |
| Jose Daniel Medina | 11-7-0 | 2026-02-28 |
| Jose Delano | 17-3-0 | 2026-04-04 |
| Jose Delgado | 12-2-0 | 2026-09-12 |
| Juan Diaz | 16-1-1 | 2026-05-16 |
| Junior Dos Santos | 21-9-0 | 2020-12-12 |
| Kelly Dullanty | 4-2-0 | 2002-03-22 |
| Kyle Daukaus | 17-5-0 (1 NC) | 2026-10-17 |
| Lerryan Douglas | 14-6-0 | 2026-08-22 |
| Luis Felipe Dias | 18-6-0 | 2026-09-05 |
| Luiz Dutra | 13-6-1 | 2015-05-30 |
| Mac Danzig | 21-12-1 | 2013-12-14 |
| Mackenzie Dern | 17-5-0 | 2026-08-15 |
| 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 |
| Matthieu Duclos | 11-3-0 | 2026-09-05 |
| Merab Dvalishvili | 21-5-0 | 2026-10-24 |
| Mike Davis | 12-4-0 | 2026-07-25 |
| 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 |
| Nicolas Dalby | 24-6-1 (2 NC) | 2025-11-22 |
| Norma Dumont | 13-3-0 | 2026-09-26 |
| Ozzy Diaz | 10-4-0 | 2026-09-19 |
| 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 |
| Rafael Dos Anjos | 32-17-0 | 2026-10-03 |