| Fighter | Record | Last Bout |
|---|---|---|
| John Lober | 5-9-4 | 1998-10-16 |
| Jorge Lopez | 11-5-0 | 2012-05-15 |
| Juliana Lima | 9-5-0 | 2018-01-27 |
| Justin Lawrence | 10-4-0 | 2013-04-13 |
| Justin Ledet | 9-4-0 (1 NC) | 2020-10-31 |
| Justin Levens | 10-7-0 | 2006-06-28 |
| Kevin Lee | 18-8-0 | 2023-07-01 |
| Kimo Leopoldo | 10-7-1 | 2004-06-19 |
| Lance Benoist | 7-2-0 | 2014-06-07 |
| Lance Gibson | 4-5-0 | 2000-12-16 |
| Landon Quinones | 7-3-1 | 2024-02-03 |
| Lara Procopio | 7-2-0 | 2021-06-19 |
| Larissa Pacheco | 10-2-0 | 2015-03-14 |
| Larry Cureton | 0-2-0 | 1995-09-08 |
| Laureano Staropoli | 9-5-0 | 2021-10-23 |
| Lauren Mueller | 5-3-0 | 2019-10-12 |
| Lavar Johnson | 18-10-0 | 2013-02-23 |
| Laverne Clark | 27-21-1 | 2000-09-22 |
| Leah Letson | 5-3-0 | 2021-11-13 |
| Leandro Issa | 13-6-0 | 2016-09-03 |
| Leandro Silva | 20-6-1 (1 NC) | 2016-09-03 |
| Lee Murray | 8-2-1 (1 NC) | 2004-01-31 |
| Leigh Remedios | 18-10-2 | 2002-07-13 |
| Leo Kuntz | 18-4-1 | 2015-11-28 |
| Leonard Garcia | 18-13-1 | 2013-04-27 |
| Leonardo Guimaraes | 11-5-0 (1 NC) | 2016-09-17 |
| Leonardo Mafra | 13-4-0 | 2015-07-18 |
| Leonardo Morales | 6-2-0 | 2015-06-06 |
| Leonardo Santos | 18-7-1 | 2022-08-20 |
| Leslie Smith | 10-7-1 | 2017-07-16 |
| Levan Makashvili | 15-2-1 | 2016-01-30 |
| Lewis Gonzalez | 11-3-0 | 2015-06-27 |
| Li Jingliang | 19-9-0 | 2024-08-17 |
| Liana Jojua | 8-5-0 | 2021-11-13 |
| Liang Na | 19-8-0 | 2024-04-27 |
| Liliya Shakirova | 8-2-0 | 2020-10-24 |
| Lina Lansberg | 10-8-0 | 2023-02-18 |
| Lisa Ellis | 15-11-0 | 2015-05-09 |
| Liudvik Sholinian | 9-4-1 | 2022-11-05 |
| Livinha Souza | 14-4-0 | 2021-10-23 |
| Liz Carmouche | 13-7-0 | 2019-08-10 |
| Lodune Sincaid | 15-9-0 | 2005-04-09 |
| Logan Clark | 18-6-0 | 2006-12-13 |
| Loik Radzhabov | 18-6-1 | 2024-07-20 |
| Lorenz Larkin | 18-6-0 (1 NC) | 2016-08-20 |
| Louis Cosce | 7-2-0 | 2022-09-17 |
| Louis Gaudinot | 8-4-0 (1 NC) | 2015-01-03 |
| Louis Smolka | 17-9-0 | 2022-05-14 |
| Lowell Anderson | 0-1-0 | 1999-09-24 |
| Luan Chagas | 15-3-1 | 2018-04-21 |