| Fighter | Record | Last Bout |
|---|---|---|
| Moti Horenstein | 1-6-0 | 1997-07-27 |
| Nasrat Haqparast | 18-7-0 | 2026-08-22 |
| Nick Hein | 14-5-0 (1 NC) | 2019-06-01 |
| Noe Hernandez | 5-5-0 | 1998-05-15 |
| Nohelin Hernandez | 9-4-0 | 2019-09-28 |
| Paddy Holohan | 12-2-1 | 2015-10-24 |
| Pat Healy | 34-23-0 (1 NC) | 2014-07-16 |
| Paul Herrera | 1-1-0 | 1996-02-16 |
| Phil Harris | 22-12-0 (2 NC) | 2014-07-19 |
| Phil Hawes | 12-6-0 | 2024-01-13 |
| Piotr Hallmann | 18-6-0 | 2015-11-07 |
| RJ Harris | 6-0-0 | 2026-07-18 |
| Ramiro Hernandez | 19-9-0 | 2014-01-25 |
| Rex Holman | 4-2-0 | 2007-03-03 |
| Richie Hightower | 8-4-0 (1 NC) | 2007-12-08 |
| Roger Hollett | 13-5-0 | 2013-05-18 |
| Roger Huerta | 23-9-1 (1 NC) | 2009-09-16 |
| Ryan Hall | 9-2-0 | 2021-12-11 |
| Sabah Homasi | 11-8-0 | 2018-01-20 |
| Saeed Hosseini | 0-1-0 | 1997-05-30 |
| Sam Hoger | 10-4-0 | 2007-02-03 |
| Sam Hughes | 11-7-0 | 2026-03-14 |
| Satoshi Honma | 4-6-3 | 2000-04-14 |
| Scott Holtzman | 14-6-0 | 2022-12-03 |
| Seo Hee Ham | 17-8-0 | 2016-11-26 |
| Shane Howell | 13-10-0 | 2015-01-18 |
| Solomon Hutcherson | 11-7-0 (1 NC) | 2006-06-24 |
| Tae Hyun Bang | 18-10-0 | 2016-09-03 |
| Tim Hague | 21-13-0 | 2011-01-22 |
| Tommy Hayden | 11-3-0 | 2012-08-11 |
| Tony Halme | 0-4-0 | 1997-05-30 |
| Uriah Hall | 18-11-0 | 2022-07-02 |
| Vernon Ramos Ho | 3-1-0 | 2015-11-21 |
| Veronica Hardy | 10-5-1 | 2025-10-04 |
| Victor Henry | 25-7-0 (1 NC) | 2025-04-05 |
| Victor Hugo | 25-5-0 | 2024-10-26 |
| Walt Harris | 13-10-0 (1 NC) | 2021-06-05 |
| Yoshinori Horie | 8-2-0 | 2019-07-27 |