| Fighter | Record | Last Bout |
|---|---|---|
| Che Mills | 16-10-0 (3 NC) | 2013-02-16 |
| Chepe Mariscal | 18-7-0 (1 NC) | 2025-11-15 |
| Christian Morecraft | 8-3-0 | 2012-01-20 |
| Christina Marks | 8-9-0 | 2017-12-01 |
| Cody McKenzie | 16-10-0 | 2013-12-14 |
| Cole Miller | 21-11-0 (1 NC) | 2016-12-17 |
| Connor Matthews | 7-4-0 | 2025-05-17 |
| Conor McGregor | 22-7-0 | 2026-07-11 |
| Cory McKenna | 8-4-0 | 2024-10-12 |
| Court McGee | 23-14-0 | 2026-10-03 |
| Cristiano Marcello | 13-6-0 | 2014-02-15 |
| Curtis Millender | 17-5-0 | 2019-04-13 |
| Dan Miller | 14-8-0 (1 NC) | 2015-07-12 |
| Dan Moret | 13-6-0 | 2019-06-29 |
| Daniel Marcos | 18-1-0 (1 NC) | 2025-11-08 |
| Danilo Marques | 11-4-0 | 2022-02-05 |
| Danny Martinez | 21-8-0 | 2015-11-14 |
| Danny Mitchell | 19-9-1 | 2014-08-23 |
| Darrell Montague | 13-5-0 | 2015-07-12 |
| Darrick Minner | 26-14-0 | 2022-11-05 |
| Dave Menne | 45-17-2 | 2006-12-13 |
| David Martinez | 14-1-0 | 2026-09-12 |
| David Michaud | 11-3-0 | 2015-04-25 |
| David Mitchell | 22-7-0 | 2013-10-09 |
| Demian Maia | 28-11-0 | 2021-06-12 |
| Ding Meng | 35-11-0 | 2026-08-29 |
| Dokonjonosuke Mishima | 21-7-2 | 2007-04-05 |
| Dom Mar Fan | 9-3-0 | 2026-05-02 |
| Don Madge | 9-3-1 | 2019-09-07 |
| Don'Tale Mayes | 11-9-0 (1 NC) | 2025-05-03 |
| Dong Hyun Ma | 16-11-3 | 2019-12-21 |
| Drew McFedries | 12-7-0 | 2009-09-19 |
| Eddie Mendez | 8-3-1 (1 NC) | 2013-06-08 |
| Eduarda Moura | 12-2-0 | 2026-09-19 |
| Eiji Mitsuoka | 18-9-2 | 2012-08-11 |
| Eliot Marshall | 10-4-0 | 2011-10-29 |
| Elvis Mutapcic | 15-6-1 | 2016-12-03 |
| Emil Meek | 9-5-1 (1 NC) | 2020-02-22 |
| Enrique Marin | 10-4-0 | 2016-07-09 |
| Eric Martin | 0-1-0 | 1997-02-07 |
| Eric McConico | 11-5-1 | 2026-08-15 |
| Erick Montano | 7-5-0 | 2016-11-05 |
| Fabio Maldonado | 23-11-0 | 2015-11-07 |
| Felix Lee Mitchell | 2-7-0 | 1996-12-07 |
| Flavio Luiz Moura | 19-7-0 | 1999-07-16 |
| Francesco Maturi | 0-1-0 | 1995-09-08 |
| Francis Marshall | 10-3-0 | 2026-04-25 |
| Frank Mir | 18-11-0 | 2016-03-19 |
| Gabriel Miranda | 17-8-0 | 2025-03-29 |
| Gan McGee | 13-5-0 | 2003-09-26 |