| Fighter | Record | Last Bout |
|---|---|---|
| Krzysztof Jotko | 24-6-0 | 2022-10-01 |
| Krzysztof Soszynski | 26-12-1 | 2011-12-10 |
| Kuniyoshi Hironaka | 23-9-0 | 2008-04-19 |
| Kurt Pellegrino | 16-7-0 | 2011-03-19 |
| Kwan Ho Kwak | 9-2-0 | 2017-06-17 |
| Kyle Bochniak | 8-5-0 | 2019-10-18 |
| Kyle Bradley | 19-12-0 (1 NC) | 2010-01-11 |
| Kyle Kingsbury | 11-6-0 (1 NC) | 2014-07-26 |
| Kyle Noke | 22-10-1 | 2016-11-26 |
| Kyle Stewart | 11-3-0 | 2019-07-27 |
| Kyle Watson | 13-8-1 | 2011-04-30 |
| Kyung Ho Kang | 19-11-0 (1 NC) | 2024-06-22 |
| 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 |