| Fighter | Record | Last Bout |
|---|---|---|
| Abner Lloveras | 20-9-1 | 2015-12-11 |
| Alberta Cerra Leon | 0-1-0 | 1994-03-11 |
| Anthony Lapsley | 23-7-0 (2 NC) | 2014-05-10 |
| Artem Lobov | 13-15-1 (1 NC) | 2018-10-27 |
| Aspen Ladd | 9-3-0 | 2022-04-09 |
| Austin Lingo | 9-3-0 | 2023-07-15 |
| Benito Lopez | 10-2-0 | 2022-11-05 |
| Bevon Lewis | 7-3-0 | 2020-11-07 |
| Branden Lee Hinkle | 17-11-0 (1 NC) | 2006-06-28 |
| Brendan Loughnane | 17-3-0 | 2012-12-14 |
| Brock Larson | 42-10-0 | 2009-11-21 |
| Brock Lesnar | 5-3-0 (1 NC) | 2016-07-09 |
| Chad Laprise | 13-4-0 | 2018-12-08 |
| Chris Leben | 22-11-0 | 2013-12-28 |
| Chris Liguori | 15-10-0 | 2003-11-21 |
| Chris Lytle | 31-18-5 | 2011-08-14 |
| Chris de la Rocha | 5-3-0 | 2018-12-15 |
| Christophe Leninger | 3-4-0 | 1997-05-30 |
| Chuck Liddell | 21-8-0 | 2010-06-12 |
| Cung Le | 9-3-0 | 2014-08-23 |
| Dalcha Lungiambula | 11-6-0 | 2022-12-10 |
| Dan Lauzon | 17-6-0 | 2010-05-29 |
| Daniel Lacerda | 11-6-0 (1 NC) | 2024-02-24 |
| David Lee | 12-10-0 | 2007-04-21 |
| David Levicki | 1-3-0 | 1994-03-11 |
| David Loiseau | 23-11-0 | 2010-06-12 |
| Dean Lister | 13-7-0 | 2008-12-27 |
| Dhiego Lima | 17-9-0 | 2021-06-19 |
| Dileno Lopes | 19-3-0 | 2016-07-07 |
| Duane Ludwig | 21-14-0 | 2012-09-29 |
| Felix Lee Mitchell | 2-7-0 | 1996-12-07 |
| Flavio Luiz Moura | 19-7-0 | 1999-07-16 |
| Frank Lester | 11-6-0 (1 NC) | 2009-06-20 |
| Gustavo Lopez | 12-6-1 | 2021-09-18 |
| Hector Lombard | 34-10-1 (2 NC) | 2018-09-22 |
| Hyun Gyu Lim | 13-7-1 | 2017-09-22 |
| Ian Loveland | 18-10-0 | 2011-08-27 |
| Icho Larenas | 6-5-0 | 2006-03-04 |
| Ilir Latifi | 17-9-0 (1 NC) | 2023-05-20 |
| Jackie Lee | 0-1-0 | 1997-02-07 |
| Jake Lindsey | 12-7-0 | 2015-03-14 |
| James Lee | 15-3-0 (1 NC) | 2008-01-19 |
| Jason Lambert | 26-13-0 | 2008-09-06 |
| Jenel Lausa | 7-5-0 | 2018-06-23 |
| Jeremy Larsen | 8-5-0 | 2013-10-19 |
| Jess Liaudin | 20-11-0 | 2008-10-18 |
| Jesse Lennox | 14-4-0 | 2010-06-12 |
| Joe Lauzon | 28-16-0 | 2019-10-18 |
| John Lewis | 3-4-3 | 2000-11-17 |
| John Lineker | 31-9-0 | 2019-04-27 |