| Fighter | Record | Last Bout |
|---|---|---|
| Claude Patrick | 14-2-0 | 2011-12-10 |
| Claudia Gadelha | 18-5-0 | 2020-11-07 |
| Claudio Puelles | 13-5-0 | 2025-09-13 |
| Claudio Ribeiro | 11-5-0 | 2024-03-02 |
| Claudio Silva | 14-4-0 | 2022-07-23 |
| Clay Collard | 14-7-0 (1 NC) | 2015-09-05 |
| Clay Guida | 38-22-0 | 2024-12-07 |
| Clay Harvison | 13-6-0 | 2011-11-12 |
| Clayton Carpenter | 8-3-0 | 2026-05-09 |
| 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 Brundage | 12-9-1 (1 NC) | 2026-05-16 |
| Cody Donovan | 8-5-0 | 2014-07-19 |
| Cody Durden | 18-11-1 | 2026-07-11 |
| Cody East | 12-3-0 | 2016-10-01 |
| Cody Garbrandt | 15-8-0 | 2026-07-11 |
| Cody Gibson | 22-13-0 | 2026-07-25 |
| Cody Haddon | 9-1-0 | 2026-05-30 |
| Cody McKenzie | 16-10-0 | 2013-12-14 |
| Cody Pfister | 13-6-1 | 2016-07-13 |
| Cody Stamann | 21-8-1 | 2024-11-09 |
| Colby Covington | 17-5-0 | 2024-12-14 |
| Colby Thicknesse | 9-1-0 | 2026-05-02 |
| 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 |
| Connor Matthews | 7-4-0 | 2025-05-17 |
| Conor McGregor | 22-7-0 | 2026-07-11 |
| 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 |
| Cortavious Romious | 9-4-0 | 2025-04-05 |
| Cortney Casey | 10-10-0 | 2022-07-09 |
| Cory Hendricks | 3-1-0 | 2016-07-08 |
| Cory McKenna | 8-4-0 | 2024-10-12 |
| Cory Sandhagen | 18-7-0 | 2026-07-11 |
| Cory Walmsley | 8-2-0 | 2006-08-26 |
| Court McGee | 23-14-0 | 2026-10-03 |
| Courtney Turner | 0-3-0 | 1998-03-13 |
| Crafton Wallace | 18-6-1 | 2006-10-10 |
| Craig White | 14-9-0 | 2018-09-08 |
| Cristian Quinonez | 19-5-0 | 2026-02-28 |
| Cristiane Justino | 21-2-0 (1 NC) | 2019-07-27 |