| Fighter | Record | Last Bout |
|---|---|---|
| Akihiro Gono | 35-21-8 | 2009-01-31 |
| Alex Garcia | 15-6-0 | 2018-10-27 |
| Alex Gorgees | 6-1-0 | 2018-12-01 |
| Alexa Grasso | 17-5-1 | 2026-09-12 |
| Alexander Gustafsson | 18-8-0 | 2022-07-23 |
| Allan Goes | 10-5-2 | 1998-05-15 |
| Andre Gusmao | 6-3-0 | 2009-05-23 |
| Andreas Gustafsson | 12-3-0 | 2025-09-06 |
| Ateba Gautier | 11-1-0 | 2026-10-03 |
| Azamat Gashimov | 8-3-0 | 2013-05-18 |
| Billy Ray Goff | 9-5-0 | 2026-08-08 |
| Bob Gilstrap | 5-7-0 | 1998-05-15 |
| Bogdan Grad | 16-4-0 | 2026-08-01 |
| Bogdan Guskov | 18-4-1 | 2026-07-25 |
| Brad Gumm | 10-6-1 (1 NC) | 2000-09-22 |
| Brian Gassaway | 29-20-2 (1 NC) | 2005-08-20 |
| Brian Geraghty | 26-18-1 | 2007-06-23 |
| Chad Griggs | 11-3-0 | 2012-11-17 |
| Charalampos Grigoriou | 8-5-0 | 2024-08-10 |
| Chase Gormley | 14-6-0 (1 NC) | 2010-03-21 |
| Chris Gruetzemacher | 15-5-0 | 2021-12-04 |
| Chris Gutierrez | 22-7-2 | 2025-10-04 |
| Christos Giagos | 20-12-0 | 2024-04-06 |
| Ciryl Gane | 14-2-0 (1 NC) | 2026-06-14 |
| Claudia Gadelha | 18-5-0 | 2020-11-07 |
| Clay Guida | 38-22-0 | 2024-12-07 |
| Cody Garbrandt | 15-8-0 | 2026-07-11 |
| Cody Gibson | 22-13-0 | 2026-07-25 |
| Damian Grabowski | 20-5-0 | 2017-07-22 |
| Darrel Gholar | 5-6-0 | 1999-01-08 |
| Dave Galera | 5-1-0 | 2014-01-04 |
| Davey Grant | 18-8-0 | 2026-04-25 |
| Denise Gomes | 13-3-0 | 2026-08-29 |
| Desmond Green | 23-8-0 | 2019-05-18 |
| Dwight Grant | 11-6-0 | 2022-07-16 |
| Eddie Gordon | 8-4-0 | 2015-06-27 |
| Edgar Garcia | 14-5-0 | 2016-01-02 |
| Eduardo Garagorri | 13-2-0 | 2020-11-07 |
| Elias Garcia | 6-2-0 | 2018-12-01 |
| Erick Gonzalez | 14-8-0 | 2023-02-25 |
| Fabio Gurgel | 3-2-0 | 1996-09-20 |
| Fernie Garcia | 10-5-0 | 2024-02-10 |
| Forrest Griffin | 19-7-0 | 2012-07-07 |
| Gabe Green | 12-5-0 | 2025-05-17 |
| Gabe Ruediger | 18-8-0 | 2011-02-05 |
| Gable Steveson | 4-0-0 | 2026-09-19 |
| Gabriel Benitez | 23-13-0 | 2024-04-27 |
| Gabriel Bonfim | 20-1-0 | 2026-11-07 |
| Gabriel Gonzaga | 17-11-0 | 2016-04-10 |
| Gabriel Miranda | 17-8-0 | 2025-03-29 |