| Fighter | Record | Last Bout |
|---|---|---|
| Lucio Linhares | 19-8-0 | 2010-03-31 |
| Ludovit Klein | 24-6-1 | 2026-08-01 |
| Luigi Fioravanti | 26-15-0 | 2009-02-07 |
| Luigi Vendramini | 9-3-0 | 2021-09-04 |
| Luis Felipe Dias | 18-6-0 | 2026-09-05 |
| Luis Gurule | 11-4-0 | 2026-05-30 |
| Luis Henrique | 10-5-0 (1 NC) | 2018-09-22 |
| Luis Pajuelo | 8-2-0 | 2024-03-23 |
| Luis Pena | 9-3-0 | 2021-04-17 |
| Luis Ramos | 20-10-2 | 2012-06-22 |
| Luis Saldana | 16-7-1 | 2022-08-20 |
| Luiz Cane | 17-7-0 (1 NC) | 2012-10-13 |
| Luiz Dutra | 13-6-1 | 2015-05-30 |
| 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 |
| Marcos Rogerio de Lima | 22-10-1 | 2024-02-17 |
| Marcus LeVesseur | 22-7-0 | 2012-12-08 |
| Mark De La Rosa | 11-5-0 | 2020-06-13 |
| Matt Lindland | 22-9-0 | 2005-08-20 |
| Matt Lucas | 15-3-0 | 2011-11-12 |
| Matthew Lopez | 10-4-0 | 2018-12-08 |
| Mickael Lebout | 16-7-1 (1 NC) | 2015-10-24 |
| Mike Lullo | 8-3-0 | 2011-09-17 |
| Mike de la Torre | 14-7-0 (1 NC) | 2017-04-08 |
| Montana De La Rosa | 13-9-1 | 2024-06-08 |
| Mounir Lazzez | 11-3-0 | 2023-01-21 |
| Natan Levy | 8-2-0 | 2024-03-16 |
| Nate Landwehr | 18-8-0 | 2026-10-17 |
| Nate Loughran | 11-2-0 | 2008-12-10 |
| Nik Lentz | 30-12-2 (1 NC) | 2021-01-23 |
| Noad Lahat | 11-2-0 | 2016-02-06 |
| Philipe Lins | 18-5-0 | 2024-03-09 |
| Pingyuan Liu | 13-7-0 | 2019-12-21 |
| Quang Le | 9-3-0 | 2025-09-13 |
| Ricardo Lamas | 20-8-0 | 2020-08-29 |
| Robbie Lawler | 30-16-0 (1 NC) | 2023-07-08 |
| Robert Lucarelli | 0-1-0 | 1994-03-11 |
| Rocky Lee | 3-2-0 | 2015-04-11 |
| Rodrigo de Lima | 8-3-1 | 2015-02-14 |