| Fighter | Record | Last Bout |
|---|---|---|
| Mikey Burnett | 5-2-0 | 1999-01-08 |
| Milana Dudieva | 11-6-0 | 2016-11-19 |
| Miles Johns | 16-5-0 (1 NC) | 2026-08-08 |
| Milos Janicic | 19-4-0 | 2026-08-01 |
| Milton Vieira | 13-8-2 | 2013-01-19 |
| Minoki Ichihara | 0-1-0 | 1994-03-11 |
| Miranda Granger | 7-3-0 | 2022-08-06 |
| Miranda Maverick | 17-6-0 | 2025-06-14 |
| Mirko Filipovic | 35-11-2 (1 NC) | 2015-04-11 |
| Mirsad Bektic | 13-4-0 | 2020-09-19 |
| Misha Cirkunov | 15-9-0 | 2022-10-15 |
| Mitch Clarke | 11-5-0 | 2017-09-09 |
| Mitch Gagnon | 12-5-0 | 2019-05-04 |
| Mitch Ramirez | 8-4-0 | 2026-07-18 |
| Mitch Raposo | 11-3-0 | 2026-06-20 |
| Mizuki | 16-6-0 | 2025-10-25 |
| Mizuto Hirota | 18-10-2 | 2018-12-01 |
| Modestas Bukauskas | 21-7-0 | 2026-09-05 |
| Mohammad Yahya | 12-6-0 | 2025-07-26 |
| Mohammed Usman | 12-4-0 | 2025-06-21 |
| Molly McCann | 14-8-0 | 2025-03-22 |
| Montana De La Rosa | 13-9-1 | 2024-06-08 |
| Montel Jackson | 15-4-0 | 2026-09-26 |
| Montse Rendon | 7-2-0 | 2026-03-14 |
| Montserrat Conejo Ruiz | 10-5-0 | 2025-11-01 |
| Morgan Charriere | 21-13-1 | 2026-09-05 |
| Mostapha Al-Turk | 6-6-0 | 2010-04-10 |
| Moti Horenstein | 1-6-0 | 1997-07-27 |
| Motonobu Tezuka | 28-12-7 | 2013-02-16 |
| Mounir Lazzez | 11-3-0 | 2023-01-21 |
| Movsar Evloev | 20-0-0 | 2026-10-24 |
| Muhammad Mokaev | 13-0-0 (1 NC) | 2024-07-27 |
| Muhammad Naimov | 13-5-0 | 2026-09-05 |
| Muhammad Saidov | 10-0-0 | 2026-07-25 |
| Muin Gafurov | 20-7-0 | 2026-02-07 |
| Murilo Bustamante | 15-8-1 | 2002-05-10 |
| Murtazali Magomedov | 11-0-0 | 2026-06-20 |
| Muslim Salikhov | 22-6-0 | 2026-09-12 |
| Myktybek Orolbai | 16-3-1 | 2026-08-15 |
| Myles Jury | 17-4-0 | 2019-02-17 |
| Nad Narimani | 12-4-0 | 2020-07-18 |
| Nadia Kassem | 5-2-0 | 2019-10-05 |
| Nah-Shon Burrell | 15-7-0 (1 NC) | 2013-05-25 |
| Nam Phan | 21-17-0 | 2014-03-01 |
| Namsrai Batbayar | 10-2-0 | 2026-08-29 |
| Nandor Guelmino | 11-5-1 | 2013-09-21 |
| Naoki Inoue | 11-1-0 | 2018-06-23 |
| Naoyuki Kotani | 34-14-7 | 2015-09-26 |
| Nasrat Haqparast | 18-7-0 | 2026-08-22 |
| Nassourdine Imavov | 17-4-0 (1 NC) | 2025-09-06 |