| Fighter | Record | Last Bout |
|---|---|---|
| Sergio Moraes | 14-6-1 | 2019-11-16 |
| Shara Magomedov | 17-1-0 | 2026-06-27 |
| Sheymon Moraes | 11-4-0 | 2019-07-13 |
| Shi Ming | 18-6-0 | 2024-11-23 |
| Sofia Montenegro | 6-3-0 | 2026-09-05 |
| Steve Montgomery | 9-5-0 | 2015-11-14 |
| Stipe Miocic | 20-5-0 | 2024-11-16 |
| Suman Mokhtarian | 8-5-0 | 2019-12-21 |
| Takeya Mizugaki | 21-11-2 | 2016-12-17 |
| Tamdan McCrory | 14-5-0 | 2016-10-01 |
| Tateki Matsuda | 13-8-0 | 2015-01-18 |
| Terrance McKinney | 18-9-0 | 2026-07-11 |
| Terrence Mitchell | 14-4-0 | 2023-09-16 |
| Terry Martin | 23-11-0 | 2008-02-02 |
| Thiago Moises | 19-10-0 | 2026-04-18 |
| Tim McKenzie | 14-9-0 | 2009-04-01 |
| Tim Means | 33-17-1 (1 NC) | 2024-10-05 |
| Todd Medina | 11-9-0 (1 NC) | 1995-04-07 |
| Tofiq Musayev | 24-6-0 | 2026-08-01 |
| Tom Murphy | 8-0-0 | 2006-03-04 |
| Tommy McMillen | 11-0-0 | 2026-09-12 |
| Troy Mandaloniz | 3-2-0 | 2009-02-21 |
| Ty Miller | 8-0-0 (1 NC) | 2026-08-08 |
| Uros Medic | 14-3-0 | 2026-08-01 |
| Valesca Machado | 8-3-0 (1 NC) | 2026-09-26 |
| Vanessa Melo | 11-8-0 | 2021-01-16 |
| Victor Martinez | 13-7-0 | 2024-05-18 |
| Vince Morales | 16-11-0 | 2026-05-02 |
| Vinicius Moreira | 9-5-0 | 2021-01-20 |
| Vinny Magalhaes | 14-9-0 (1 NC) | 2013-08-03 |
| Vitor Miranda | 12-5-0 | 2018-07-22 |
| Vladimir Matyushenko | 27-8-0 | 2013-01-26 |
| War Machine | 14-5-0 | 2008-05-24 |
| Wendell Oliveira Marques | 29-10-0 | 2015-05-30 |
| William Macario | 9-3-0 | 2015-02-22 |
| Yancy Medeiros | 15-8-0 (1 NC) | 2021-06-26 |
| Yaotzin Meza | 21-11-0 (1 NC) | 2016-02-27 |
| Zabit Magomedsharipov | 18-1-0 | 2019-11-09 |
| Zach Makovsky | 20-8-0 | 2016-12-10 |
| Zhang Mingyang | 19-8-0 | 2026-05-30 |