| Fighter | Record | Last Bout |
|---|---|---|
| Thaddeus Luster | 0-1-0 | 1994-03-11 |
| Thales Leites | 28-9-0 | 2018-09-22 |
| Tim Lajcik | 7-6-1 | 2000-09-22 |
| Tina Lahdemaki | 5-1-0 | 2014-07-16 |
| Tom Lawlor | 10-6-0 (1 NC) | 2016-03-05 |
| Travis Lutter | 10-6-0 | 2008-04-19 |
| Tucker Lutz | 12-4-0 | 2023-07-15 |
| Valerie Letourneau | 8-6-0 | 2016-12-10 |
| Valmir Lazaro | 15-5-0 | 2015-11-21 |
| Vaughan Lee | 14-13-1 | 2015-07-18 |
| Victoria Leonardo | 9-7-0 | 2024-08-24 |
| Waylon Lowe | 16-7-0 (2 NC) | 2011-03-26 |
| Yohan Lainesse | 9-3-0 | 2024-01-20 |
| Zach Light | 9-11-0 | 2002-06-22 |
| Zhang Lipeng | 23-9-1 | 2015-05-16 |
| Zviad Lazishvili | 13-1-0 | 2021-10-23 |