| Fighter | Record | Last Bout |
|---|---|---|
| Marcio Cruz | 8-3-0 | 2006-12-30 |
| Mark Choinski | 8-1-0 | 2025-06-07 |
| Mark Coleman | 16-10-0 | 2010-02-06 |
| Matheus Camilo | 11-3-0 | 2026-06-27 |
| Melissa Croden | 8-3-0 | 2026-10-17 |
| Melquizael Costa | 26-8-0 | 2026-05-16 |
| Michael Chandler | 23-11-0 | 2026-06-14 |
| Michael Chiesa | 20-7-0 | 2026-03-28 |
| Mike Ciesnolevicz | 19-4-0 (1 NC) | 2009-06-20 |
| Misha Cirkunov | 15-9-0 | 2022-10-15 |
| Mitch Clarke | 11-5-0 | 2017-09-09 |
| Montserrat Conejo Ruiz | 10-5-0 | 2025-11-01 |
| Morgan Charriere | 21-13-1 | 2026-09-05 |
| Nathan Coy | 15-7-0 | 2017-04-15 |
| Nick Catone | 10-4-0 | 2014-02-01 |
| Nicolle Caliari | 9-4-0 | 2026-05-16 |
| Nora Cornolle | 10-4-0 | 2026-09-05 |
| Orion Cosce | 8-2-0 | 2023-05-20 |
| Patrick Cote | 23-11-0 | 2017-04-08 |
| Patrick Cummins | 10-7-0 | 2019-05-18 |
| Paul Craig | 17-10-1 (1 NC) | 2025-09-06 |
| Paul Creighton | 3-1-0 | 2002-05-10 |
| Paulo Costa | 16-4-0 | 2026-04-11 |
| Priscila Cachoeira | 13-9-0 | 2026-06-06 |
| Rafael Carino | 2-1-1 | 1996-05-17 |
| Rafael Cavalcante | 12-7-0 (1 NC) | 2016-02-06 |
| Rafael Cerqueira | 11-4-0 | 2025-11-22 |
| Randy Costa | 6-4-0 | 2022-10-01 |
| Randy Couture | 19-11-0 | 2011-04-30 |
| Rashad Coulter | 9-4-0 | 2018-11-24 |
| Rich Clementi | 45-23-1 | 2009-02-07 |
| Richard Crunkilton | 19-4-0 | 2003-04-25 |
| Roan Carneiro | 21-11-0 | 2017-02-11 |
| Ron van Clief | 0-1-0 | 1994-12-16 |
| Ryan Couture | 11-5-0 | 2013-08-31 |
| Ryo Chonan | 22-13-0 | 2009-04-18 |
| Sako Chivitchian | 8-1-0 | 2010-12-04 |
| SeungGuk Choi | 7-3-0 | 2023-02-04 |
| SeungWoo Choi | 11-8-0 | 2025-03-15 |
| Shane Campbell | 14-6-0 | 2016-08-27 |
| Shane Carwin | 12-2-0 | 2011-06-11 |
| Shane Collins | 8-0-0 | 2026-06-20 |
| Shonie Carter | 51-31-7 (1 NC) | 2006-12-13 |
| Spike Carlyle | 9-3-0 | 2020-11-28 |
| Steve Cantwell | 7-6-0 | 2012-02-25 |
| Terrance Chatman | 5-2-0 | 2026-08-22 |
| Tim Credeur | 12-4-0 | 2011-06-04 |
| Timmy Cuamba | 10-4-0 | 2026-10-17 |
| Tracy Cortez | 12-4-0 | 2026-07-11 |
| Tristan Connelly | 14-8-0 | 2022-04-30 |