| Fighter | Record | Last Bout |
|---|---|---|
| Mara Romero Borella | 12-9-0 (2 NC) | 2020-09-19 |
| Marc Diakiese | 17-7-0 | 2023-11-04 |
| Marc-Andre Barriault | 17-11-0 (1 NC) | 2026-10-17 |
| Marcel Fortuna | 9-3-0 | 2017-11-11 |
| Marcelo Aguiar | 2-3-1 | 2000-06-09 |
| Marcelo Golm | 6-3-0 | 2019-04-20 |
| Marcelo Guimaraes | 9-2-1 | 2016-03-05 |
| Marcelo Mello | 1-0-0 | 1999-05-07 |
| Marcelo Rojo | 16-10-0 | 2022-12-03 |
| Marcin Bandel | 15-7-0 | 2015-04-11 |
| Marcin Held | 23-7-0 | 2017-10-21 |
| Marcin Prachnio | 17-9-0 | 2025-07-19 |
| Marcin Tybura | 27-12-0 | 2026-08-01 |
| Marcin Wrzosek | 12-4-0 | 2015-12-11 |
| Marcio Alexandre Junior | 17-4-0 | 2015-12-12 |
| Marcio Barbosa | 19-2-0 | 2026-08-22 |
| Marcio Cruz | 8-3-0 | 2006-12-30 |
| Marco Beltran | 8-6-0 | 2017-10-07 |
| Marco Polo Reyes | 8-7-0 | 2019-09-21 |
| Marco Ruas | 9-4-2 | 1999-07-16 |
| Marco Tulio | 14-3-0 | 2026-05-09 |
| Marcos Mariano | 6-6-0 | 2019-09-21 |
| Marcos Rogerio de Lima | 22-10-1 | 2024-02-17 |
| Marcos Vinicius | 23-11-1 | 2013-09-04 |
| Marcus Aurelio | 22-10-0 | 2009-08-29 |
| Marcus Bossett | 1-3-0 | 1996-12-07 |
| Marcus Brimage | 7-7-0 | 2015-07-18 |
| Marcus Buchecha | 5-3-1 | 2026-04-25 |
| Marcus Davis | 22-11-0 (1 NC) | 2011-01-01 |
| Marcus Jones | 4-2-0 | 2009-12-05 |
| Marcus LeVesseur | 22-7-0 | 2012-12-08 |
| Marcus McGhee | 11-2-0 | 2026-10-03 |
| Marcus Silveira | 6-4-0 (1 NC) | 1997-12-21 |
| Marek Bujlo | 6-1-0 | 2025-11-22 |
| 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 |