| Fighter | Record | Last Bout |
|---|---|---|
| Lukasz Brzeski | 9-7-1 (1 NC) | 2025-07-19 |
| Lukasz Sajewski | 13-3-0 | 2016-10-08 |
| Luke Barnatt | 13-4-0 | 2015-05-16 |
| Luke Caudillo | 17-17-0 | 2007-11-17 |
| Luke Cummo | 6-6-0 | 2008-08-09 |
| Luke Fernandez | 6-1-0 | 2026-03-07 |
| Luke Jumeau | 13-5-0 | 2019-10-05 |
| Luke Riley | 14-0-0 | 2026-07-11 |
| Luke Rockhold | 16-6-0 | 2022-08-20 |
| Luke Sanders | 13-5-0 | 2021-05-01 |
| Luke Zachrich | 14-4-0 | 2014-11-07 |
| Lyman Good | 21-6-0 (1 NC) | 2020-06-20 |
| Lyoto Machida | 24-8-0 | 2018-05-12 |
| Mac Danzig | 21-12-1 | 2013-12-14 |
| Maciej Jewtuszko | 12-3-0 | 2011-02-26 |
| Mackens Semerzier | 8-4-0 (1 NC) | 2012-03-02 |
| Mackenzie Dern | 17-5-0 | 2026-08-15 |
| Macy Chiasson | 11-6-0 | 2026-02-28 |
| Mads Burnell | 9-3-0 | 2018-05-27 |
| Magnus Cedenblad | 14-5-0 | 2016-11-19 |
| Magomed Ankalaev | 22-2-1 (1 NC) | 2026-07-25 |
| Magomed Bibulatov | 14-2-0 | 2019-02-02 |
| Magomed Gadzhiyasulov | 9-1-0 | 2025-01-11 |
| Magomed Mustafaev | 14-4-0 | 2020-02-22 |
| Magomed Tuchalov | 7-0-0 | 2026-07-25 |
| Magomed Zaynukov | 9-0-0 | 2026-07-25 |
| Maheshate | 12-5-0 | 2025-08-23 |
| Maia Stevenson | 6-5-0 | 2018-02-03 |
| Maiquel Falcao | 37-10-0 (1 NC) | 2010-11-20 |
| Mairbek Taisumov | 27-6-0 | 2019-09-07 |
| Mairon Santos | 18-1-0 | 2025-12-06 |
| Makhmud Muradov | 26-8-0 (1 NC) | 2024-02-03 |
| Maki Pitolo | 13-9-0 | 2021-12-04 |
| Makwan Amirkhani | 17-9-0 | 2023-03-18 |
| Malcolm Gordon | 14-8-0 | 2024-01-20 |
| Malcolm Wellmaker | 10-2-0 | 2026-05-16 |
| Mallory Martin | 7-5-0 | 2021-12-04 |
| Mana Martinez | 10-4-0 | 2023-03-04 |
| Mandel Nallo | 14-4-0 (1 NC) | 2026-10-17 |
| Mandy Bohm | 8-2-0 (1 NC) | 2023-05-13 |
| Manel Kape | 23-7-0 | 2026-06-20 |
| Manny Bermudez | 14-2-0 | 2019-10-18 |
| Manoel Sousa | 15-1-0 | 2026-08-08 |
| Manolo Zecchini | 11-5-0 | 2026-04-04 |
| Manon Fiorot | 13-2-0 | 2026-09-12 |
| Mansur Abdul-Malik | 9-2-1 | 2026-08-15 |
| Mantas Kondratavicius | 9-1-0 | 2026-03-21 |
| Manuel Rodriguez | 11-5-0 | 2012-12-14 |
| Manuel Torres | 17-4-0 | 2026-06-27 |
| Manvel Gamburyan | 15-10-0 (1 NC) | 2016-11-19 |