| Fighter | Record | Last Bout |
|---|---|---|
| Gloria de Paula | 6-5-0 | 2022-06-18 |
| Glover Teixeira | 33-9-0 | 2023-01-21 |
| Godofredo Pepey | 13-6-0 | 2018-01-27 |
| Gokhan Saki | 1-2-0 | 2018-07-07 |
| Gokhan Saricam | 12-2-0 | 2026-04-18 |
| Goran Reljic | 15-8-0 | 2010-11-13 |
| Grant Dawson | 24-3-1 | 2026-10-24 |
| Gray Maynard | 13-7-1 (1 NC) | 2018-10-06 |
| Greg Hardy | 7-5-0 (1 NC) | 2022-03-05 |
| Greg Soto | 9-4-0 | 2011-01-01 |
| Greg Stott | 0-1-0 | 1997-10-17 |
| Gregor Gillespie | 14-1-0 | 2021-05-08 |
| Gregory Rodrigues | 20-6-0 | 2026-08-22 |
| Grigory Popov | 13-3-0 | 2019-11-09 |
| Guangyou Ning | 5-4-1 | 2016-11-26 |
| Guido Cannetti | 10-8-0 | 2023-03-11 |
| Guilherme Pat | 6-2-0 | 2026-08-08 |
| Guilherme Vasconcelos | 9-4-0 | 2014-07-05 |
| Gunnar Nelson | 19-6-1 | 2025-03-22 |
| Guram Kutateladze | 13-5-0 | 2025-03-22 |
| Gustavo Lopez | 12-6-1 | 2021-09-18 |
| Guto Inocente | 7-4-0 | 2014-11-07 |
| Guy Mezger | 30-14-2 | 1999-03-05 |
| Hacran Dias | 23-6-1 | 2017-10-28 |
| Hailey Cowan | 7-6-0 | 2026-08-01 |
| Hakeem Dawodu | 13-4-1 | 2023-08-12 |
| Hamdy Abdelwahab | 7-1-0 (1 NC) | 2025-10-25 |
| Hannah Cifers | 10-7-0 | 2020-08-29 |
| Hannah Goldy | 6-4-0 | 2023-09-23 |
| Hans Stringer | 22-8-3 | 2015-07-18 |
| Harold Howard | 1-3-0 | 1995-09-08 |
| Harry Hardwick | 13-5-1 | 2026-03-14 |
| Harry Hunsucker | 7-6-0 | 2022-08-20 |
| Harry Moskowitz | 6-12-0 | 1998-05-15 |
| Hatsu Hioki | 29-10-2 | 2015-05-09 |
| Hayato Sakurai | 38-13-2 | 2002-03-22 |
| Hayder Hassan | 6-3-0 | 2015-12-19 |
| He-Man Gipson | 1-2-0 | 1995-07-14 |
| Heath Herring | 28-16-0 (1 NC) | 2008-08-09 |
| Heather Clark | 7-6-0 | 2016-11-05 |
| Hecher Sosa | 15-1-0 | 2026-03-14 |
| 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 Santiago | 7-1-0 | 2026-08-29 |
| 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 Cejudo | 16-6-0 | 2025-12-06 |