| Fighter | Record | Last Bout |
|---|---|---|
| Maria Oliveira | 13-7-0 | 2023-06-10 |
| Marina Rodriguez | 17-6-2 | 2025-05-03 |
| Marina Spasic | 7-2-0 | 2026-08-01 |
| Mario Bautista | 18-3-0 | 2026-07-11 |
| Mario Miranda | 14-7-0 | 2011-03-26 |
| Mario Neto | 13-5-0 | 2006-09-23 |
| Mario Pinto | 13-0-0 | 2026-09-05 |
| Marion Reneau | 9-8-1 | 2021-07-17 |
| Mariya Agapova | 10-5-0 | 2024-07-13 |
| Mark Bocek | 12-5-0 | 2014-04-16 |
| Mark Choinski | 8-1-0 | 2025-06-07 |
| Mark Coleman | 16-10-0 | 2010-02-06 |
| Mark De La Rosa | 11-5-0 | 2020-06-13 |
| Mark Eddiva | 6-3-0 | 2016-03-19 |
| Mark Godbeer | 13-4-0 | 2018-03-17 |
| Mark Hall | 5-6-0 | 1996-12-07 |
| Mark Holst | 12-6-0 | 2010-10-16 |
| Mark Hominick | 20-12-0 | 2012-11-17 |
| Mark Hughes | 6-2-0 | 2000-11-17 |
| Mark Hunt | 13-14-1 (1 NC) | 2018-12-01 |
| Mark Kerr | 15-11-0 (1 NC) | 1997-10-17 |
| Mark Madsen | 12-2-0 | 2023-11-11 |
| Mark Munoz | 14-6-0 | 2015-05-16 |
| Mark Robinson | 1-0-0 (1 NC) | 2001-02-23 |
| Mark Scanlon | 9-2-0 | 2010-11-13 |
| Mark Schultz | 1-1-0 | 1996-05-17 |
| Mark Striegl | 18-4-0 (1 NC) | 2022-02-19 |
| Mark Vologdin | 12-5-2 | 2026-08-01 |
| Mark Weir | 21-18-1 | 2003-04-25 |
| Markus Perez | 12-5-0 | 2021-01-20 |
| Marlon Moraes | 23-10-1 | 2022-03-12 |
| Marlon Vera | 23-12-1 | 2026-09-19 |
| Marnic Mann | 6-3-0 | 2024-04-27 |
| Martin Bravo | 11-3-0 | 2019-09-21 |
| Martin Buday | 16-2-0 | 2025-07-26 |
| Martin Day | 8-6-0 | 2021-02-06 |
| Martin Kampmann | 20-7-0 | 2013-08-28 |
| Martin Sano | 4-3-1 | 2021-09-25 |
| Martin Svensson | 15-6-0 | 2016-02-27 |
| Marvin Eastman | 18-15-1 | 2008-06-21 |
| Marvin Vettori | 19-10-1 | 2026-10-03 |
| Marwan Rahiki | 9-0-0 | 2026-09-12 |
| Maryna Moroz | 11-6-0 | 2024-03-09 |
| Masanori Kanehara | 26-12-5 | 2016-01-02 |
| Masio Fullen | 11-7-0 | 2016-01-30 |
| Mason Jones | 18-3-0 (1 NC) | 2026-08-22 |
| Masutatsu Yano | 2-4-1 | 1999-11-19 |
| Mateus Mendonca | 10-3-0 | 2024-02-24 |
| Mateusz Gamrot | 26-5-0 (1 NC) | 2026-08-08 |
| Mateusz Rebecki | 21-5-0 | 2026-08-01 |