| Fighter | Record | Last Bout |
|---|---|---|
| Heath Herring | 28-16-0 (1 NC) | 2008-08-09 |
| Heather Clark | 7-6-0 | 2016-11-05 |
| Hector Aldana | 4-3-0 | 2019-10-12 |
| Hector Lombard | 34-10-1 (2 NC) | 2018-09-22 |
| Hector Ramirez | 10-6-1 | 2007-06-16 |
| Hector Sandoval | 14-4-0 | 2017-08-05 |
| Hector Urbina | 17-10-1 | 2016-09-24 |
| Henrique da Silva | 14-5-0 | 2017-09-22 |
| Henry Briones | 16-8-1 | 2018-05-19 |
| Henry Martinez | 9-4-0 | 2012-12-08 |
| Herbert Burns | 11-6-0 | 2024-08-17 |
| Hermes Franca | 24-17-0 (1 NC) | 2009-09-19 |
| Hernani Perpetuo | 18-5-0 (1 NC) | 2014-07-26 |
| Holly Holm | 15-7-0 (1 NC) | 2024-04-13 |
| Homer Moore | 26-9-2 | 2001-11-02 |
| Horacio Gutierrez | 4-3-0 | 2016-08-06 |
| Houston Alexander | 17-15-1 (2 NC) | 2009-12-05 |
| Houston Dorr | 1-2-0 | 1997-10-17 |
| Hu Yaozong | 3-3-0 | 2021-10-30 |
| Hugo Duarte | 6-3-0 | 1998-05-15 |
| Hugo Viana | 8-4-0 | 2015-08-01 |
| Humberto Bandenay | 14-7-0 (1 NC) | 2019-08-10 |
| Humberto Brown Morrison | 4-6-0 | 2014-11-15 |
| Hunter Azure | 9-2-0 | 2021-04-10 |
| Hyun Gyu Lim | 13-7-1 | 2017-09-22 |
| Ian Entwistle | 9-3-0 | 2016-04-10 |
| Ian Freeman | 20-7-1 | 2003-06-06 |
| Ian Heinisch | 14-5-0 | 2021-07-24 |
| Ian Loveland | 18-10-0 | 2011-08-27 |
| Ian McCall | 13-5-1 | 2015-01-31 |
| Icho Larenas | 6-5-0 | 2006-03-04 |
| Igor Araujo | 25-9-0 (1 NC) | 2015-07-15 |
| Igor Pokrajac | 28-13-0 (1 NC) | 2016-04-10 |
| Igor Severino | 8-1-0 | 2024-03-23 |
| Igor Zinoviev | 4-1-2 | 1998-03-13 |
| Ike Villanueva | 18-14-0 | 2022-04-23 |
| Ikuhisa Minowa | 60-42-8 | 2000-04-14 |
| Ildemar Alcantara | 21-11-0 | 2015-07-15 |
| Iliarde Santos | 30-13-1 (1 NC) | 2013-10-09 |
| Ilir Latifi | 17-9-0 (1 NC) | 2023-05-20 |
| Impa Kasanganay | 9-2-0 | 2021-09-18 |
| Irwin Rivera | 10-6-0 | 2020-09-19 |
| Isaac Vallie-Flagg | 16-7-1 | 2014-11-22 |
| Isabela de Padua | 5-2-0 | 2019-11-16 |
| Issei Tamura | 10-8-0 | 2013-03-16 |
| Iuri Alcantara | 35-10-0 (1 NC) | 2018-08-25 |
| Ivan Jorge | 27-7-0 | 2015-07-18 |
| Ivan Menjivar | 25-12-0 | 2014-03-01 |
| Ivan Salaverry | 14-9-0 | 2008-05-24 |
| Ivan Serati | 12-4-0 | 2009-01-17 |