| Fighter | Record | Last Bout |
|---|---|---|
| Claudio Silva | 14-4-0 | 2022-07-23 |
| Clay Collard | 14-7-0 (1 NC) | 2015-09-05 |
| Clay Harvison | 13-6-0 | 2011-11-12 |
| Clifford Starks | 13-3-0 | 2013-04-20 |
| Clint Hester | 11-6-0 | 2016-04-23 |
| CM Punk | 0-1-0 (1 NC) | 2018-06-09 |
| Cody Donovan | 8-5-0 | 2014-07-19 |
| Cody East | 12-3-0 | 2016-10-01 |
| Cody McKenzie | 16-10-0 | 2013-12-14 |
| Cody Pfister | 13-6-1 | 2016-07-13 |
| Cole Escovedo | 17-9-0 | 2011-11-12 |
| Cole Miller | 21-11-0 (1 NC) | 2016-12-17 |
| Cole Smith | 7-2-0 | 2020-09-05 |
| Cole Williams | 11-3-0 | 2020-10-31 |
| Colin Fletcher | 14-8-0 | 2013-03-16 |
| Colin Robinson | 10-12-0 | 2008-01-19 |
| Collin Anglin | 8-3-0 | 2021-11-13 |
| Collin Hart | 6-3-1 | 2013-04-13 |
| Colton Smith | 7-4-0 | 2014-06-28 |
| Constantinos Philippou | 13-5-0 (1 NC) | 2015-05-16 |
| Corey Anderson | 14-5-0 | 2020-02-15 |
| Corey Hill | 6-9-0 | 2008-12-10 |
| Cortney Casey | 10-10-0 | 2022-07-09 |
| Cory Hendricks | 3-1-0 | 2016-07-08 |
| Cory Walmsley | 8-2-0 | 2006-08-26 |
| Courtney Turner | 0-3-0 | 1998-03-13 |
| Crafton Wallace | 18-6-1 | 2006-10-10 |
| Craig White | 14-9-0 | 2018-09-08 |
| Cristiane Justino | 21-2-0 (1 NC) | 2019-07-27 |
| Cristiano Marcello | 13-6-0 | 2014-02-15 |
| Cristina Stanciu | 5-2-0 | 2016-07-13 |
| Cung Le | 9-3-0 | 2014-08-23 |
| Curt Warburton | 13-6-0 | 2011-06-26 |
| Curtis Millender | 17-5-0 | 2019-04-13 |
| Curtis Stout | 11-12-1 | 2004-06-19 |
| Cynthia Calvillo | 9-6-1 | 2023-04-08 |
| Cyril Asker | 9-4-0 | 2018-02-10 |
| Cyrille Diabate | 19-10-1 | 2014-03-08 |
| 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 |
| DaMarques Johnson | 15-15-0 | 2012-09-29 |
| 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 |