| Fighter | Record | Last Bout |
|---|---|---|
| Abus Magomedov | 29-7-1 | 2026-10-24 |
| Adam Milstead | 8-4-0 | 2018-12-15 |
| Adrian Luna Martinetti | 17-2-0 | 2026-04-25 |
| Adriano Martins | 28-9-0 | 2017-09-09 |
| Albert Morales | 7-4-1 | 2018-02-24 |
| Alberto Mina | 13-1-0 | 2018-05-12 |
| Alberto Montes | 12-2-0 | 2026-07-18 |
| Alex Morono | 24-13-0 (1 NC) | 2026-02-07 |
| Alexander Munoz | 7-2-0 | 2023-07-15 |
| Alonzo Menifield | 18-6-1 | 2026-09-19 |
| Alvaro Herrera Mendoza | 9-6-0 | 2018-07-28 |
| Andre Muniz | 24-8-0 | 2025-10-04 |
| Andreas Michailidis | 13-6-0 | 2022-06-04 |
| Angela Magana | 11-9-0 | 2017-12-02 |
| Anistavio Medeiros | 19-10-0 | 2012-06-23 |
| Anna Melisano | 6-2-0 | 2026-07-18 |
| Anthony Macias | 26-18-0 | 1995-07-14 |
| Anthony Rocco Martin | 17-6-0 | 2020-06-06 |
| Antonio McKee | 29-6-2 | 2011-01-01 |
| Antonio Mendes | 18-13-0 | 2009-01-17 |
| Artur Minev | 7-1-0 | 2026-05-16 |
| Ashkan Mokhtarian | 13-3-0 | 2017-11-18 |
| Askar Mozharov | 19-13-0 | 2022-06-04 |
| Augusto Mendes | 6-2-0 | 2017-04-15 |
| Augusto Montano | 15-3-0 | 2016-09-17 |
| Azamat Murzakanov | 16-1-0 | 2026-10-24 |
| Azat Maksum | 15-3-0 | 2025-10-25 |
| Bea Malecki | 4-1-0 | 2021-08-21 |
| Belal Muhammad | 24-6-0 (1 NC) | 2026-06-06 |
| Bernardo Magalhaes | 13-4-0 | 2012-06-08 |
| Bia Mesquita | 8-0-0 | 2026-06-20 |
| Bill Mahood | 20-7-1 (1 NC) | 2005-06-04 |
| Billy Miles | 2-2-0 | 2007-12-08 |
| Bobby Moffett | 13-5-0 (1 NC) | 2019-08-10 |
| Bojan Mihajlovic | 10-6-0 | 2017-09-02 |
| Brad Morris | 10-6-0 | 2008-09-17 |
| Brandon Melendez | 25-25-0 | 2007-06-23 |
| Brandon Moreno | 23-10-2 | 2026-09-12 |
| Brendon Marotte | 8-3-0 | 2024-09-07 |
| Brian Melancon | 7-3-0 | 2013-08-28 |
| Bristol Marunde | 16-10-0 | 2013-08-03 |
| Bryce Mitchell | 19-4-0 | 2026-06-06 |
| Caio Machado | 8-4-1 | 2024-11-02 |
| Caio Magalhaes | 10-3-0 | 2016-09-10 |
| Carlos Mota | 8-2-0 | 2022-10-29 |
| Carlton Minus | 10-3-0 (1 NC) | 2020-12-19 |
| Carmelo Marrero | 16-6-0 (1 NC) | 2009-04-01 |
| Cesar Marscucci | 3-2-0 | 1998-10-16 |
| Chad Mendes | 18-5-0 | 2018-12-29 |
| Charles McCarthy | 10-5-0 | 2008-04-19 |