| Fighter | Record | Last Bout |
|---|---|---|
| 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 |
| Cristiano Marcello | 13-6-0 | 2014-02-15 |
| Cristina Stanciu | 5-2-0 | 2016-07-13 |
| Cub Swanson | 31-14-0 | 2026-04-11 |
| Cung Le | 9-3-0 | 2014-08-23 |
| Curt Warburton | 13-6-0 | 2011-06-26 |
| Curtis Blaydes | 19-6-0 (1 NC) | 2026-09-12 |
| 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 |
| Dan Christison | 20-7-0 | 2006-07-08 |
| Dan Cramer | 11-4-0 | 2009-08-08 |
| Daniel Cormier | 22-3-0 (1 NC) | 2020-08-15 |
| Danny Castillo | 17-10-0 | 2015-12-19 |
| Danny Chavez | 11-5-1 | 2022-06-18 |
| Daron Cruickshank | 18-10-0 (1 NC) | 2016-01-17 |
| Devin Clark | 14-9-0 | 2024-02-10 |
| Dominick Cruz | 24-4-0 | 2022-08-13 |
| Donald Cerrone | 36-17-0 (2 NC) | 2022-07-02 |
| DongHun Choi | 9-0-0 | 2024-11-23 |
| Donnie Chappell | 0-1-0 | 1997-07-27 |
| Dooho Choi | 17-4-1 | 2026-09-19 |
| Dwayne Cason | 1-1-0 | 1997-10-17 |
| Edgar Chairez | 14-6-0 (1 NC) | 2026-09-12 |
| Eduardo Chapolin | 15-3-0 | 2026-08-15 |
| Ernest Chavez | 10-2-0 | 2014-10-04 |
| Fabio Cherant | 7-4-0 | 2022-02-12 |
| Fabricio Camoes | 14-9-1 | 2014-10-25 |
| Felipe Colares | 10-4-0 | 2022-05-21 |
| Francis Carmont | 25-12-0 | 2014-08-23 |
| Frank Camacho | 22-10-0 | 2022-05-14 |
| Frank Caracci | 2-3-0 | 1999-01-08 |
| Giga Chikadze | 15-6-0 | 2026-09-19 |
| Gigi Canuto | 7-2-0 | 2026-08-08 |