| Keith Hackney (inactive) | The Giant Killer | 2-2-0 | United States | Dec 16, 1995 |
| Cody Haddon | | 2-0-0 | Australia | May 30, 2026 |
| Jake Hadley (inactive) | White Kong | 3-4-0 | United Kingdom | Oct 19, 2024 |
| Damir Hadzovic (inactive) | The Bosnian Bomber | 4-6-0 | Unknown | Feb 1, 2025 |
| Bassil Hafez | The Habibi | 1-2-0 | United States | Nov 16, 2024 |
| Tim Hague (inactive) | The Trashing Machine | 1-4-0 | Canada | Jan 22, 2011 |
| Mark Hall (inactive) | | 4-3-0 | Unknown | Dec 7, 1996 |
| Ryan Hall | The Wizard | 5-1-0 | United States | Dec 11, 2021 |
| Uriah Hall (inactive) | Prime Time | 10-9-0 | Jamaica | Jul 2, 2022 |
| Dennis Hallman (inactive) | Superman | 4-5-0 | United States | Dec 10, 2011 |
| Piotr Hallmann (inactive) | Pletwal | 2-4-0 | Poland | Nov 7, 2015 |
| Tony Halme (inactive) | | 0-1-0 | Finland | May 30, 1997 |
| John Halverson (inactive) | The Hurricane | 0-2-0 | United States | Mar 1, 2008 |
| Seo Hee Ham (inactive) | | 1-3-0 | South Korea | Nov 26, 2016 |
| Frank Hamaker (inactive) | | 1-0-0 | United States | Mar 11, 1994 |
| Matt Hamill (inactive) | The Hammer | 10-5-0 | United States | Oct 9, 2013 |
| Anthony Hamilton (inactive) | Freight Train | 3-7-0 | United States | Nov 18, 2017 |
| Jared Hamman (inactive) | The Messenger | 2-5-0 | United States | Aug 31, 2013 |
| James Hammortree (inactive) | The Sledge | 0-1-0 | United States | Jun 19, 2010 |
| Kay Hansen (inactive) | | 1-3-0 | United States | Apr 9, 2022 |
| Nasrat Haqparast | | 10-6-0 | Germany | Aug 22, 2026 |
| Antoni Hardonk (inactive) | | 4-4-0 | United States | Oct 24, 2009 |
| Harry Hardwick | Houdini | 0-2-0 | United Kingdom | Mar 14, 2026 |
| Dan Hardy (inactive) | The Outlaw | 6-4-0 | United Kingdom | Sep 29, 2012 |
| Greg Hardy (inactive) | Prince of War | 4-5-0 (1 NC) | United States | Mar 5, 2022 |
| Veronica Hardy | | 5-5-0 | Venezuela | Oct 4, 2025 |
| Josiah Harrell | The Muscle Hamster | 0-2-0 | United States | Sep 26, 2026 |
| Carlston Harris (inactive) | Mocambique | 4-4-0 | Guyana | May 30, 2026 |
| Gerald Harris (inactive) | | 3-1-0 | United States | Nov 20, 2010 |
| Gerry Harris (inactive) | | 0-1-0 | Unknown | Sep 8, 1995 |
| Phil Harris (inactive) | Billy | 1-3-0 (1 NC) | United Kingdom | Jul 19, 2014 |
| RJ Harris | The Hammer | 1-0-0 | United States | Jul 18, 2026 |
| Walt Harris (inactive) | The Big Ticket | 6-9-0 (1 NC) | United States | Jun 5, 2021 |
| Kayla Harrison | | 3-0-0 | United States | Jun 7, 2025 |
| Collin Hart (inactive) | | 0-1-0 | United States | Apr 13, 2013 |
| Dale Hartt (inactive) | | 1-2-0 | United States | Jun 13, 2009 |
| Clay Harvison (inactive) | Bushwacker | 1-2-0 | United States | Nov 12, 2011 |
| Bilal Hasan | The IndoNinja | 1-0-0 | United States | Aug 29, 2026 |
| Farman Hasanov | The Lion | 1-0-0 | Azerbaijan | Jun 27, 2026 |
| Chris Haseman (inactive) | The Hammer | 0-1-0 | Australia | Jul 13, 2002 |
| Hayder Hassan (inactive) | Hulk | 0-2-0 | United States | Dec 19, 2015 |
| John Hathaway (inactive) | The Hitman | 7-2-0 | United Kingdom | Mar 1, 2014 |
| Phil Hawes | No Hype | 4-4-0 | United States | Jan 13, 2024 |
| Tommy Hayden (inactive) | Wild Card | 0-2-0 | United States | Aug 11, 2012 |
| Josh Haynes (inactive) | Bring the Pain | 0-3-0 | United States | Apr 7, 2007 |
| Dustin Hazelett (inactive) | McLovin | 5-5-0 | United States | Dec 11, 2010 |
| James Head (inactive) | | 2-3-0 | United States | Aug 28, 2013 |
| Pat Healy (inactive) | Bam Bam | 0-5-0 (1 NC) | United States | Jul 16, 2014 |
| David Heath (inactive) | | 2-3-0 | United States | Feb 2, 2008 |
| Chris Heatherly (inactive) | Stump | 0-2-0 | United States | Nov 15, 2014 |
| Jake Hecht (inactive) | Hitman | 1-2-0 | United States | Jun 8, 2012 |
| Nick Hein (inactive) | Sergeant | 4-4-0 | Germany | Jun 1, 2019 |
| Ian Heinisch | The Hurricane | 3-4-0 | United States | Jul 24, 2021 |
| Marcin Held (inactive) | | 1-3-0 | Poland | Oct 21, 2017 |
| Delson Heleno (inactive) | Pe De Chumbo | 0-1-0 | Brazil | Jun 23, 2012 |
| Benson Henderson (inactive) | Smooth | 11-3-0 | United States | Nov 28, 2015 |
| Dan Henderson (inactive) | Hendo | 9-9-0 | United States | Oct 8, 2016 |
| Cory Hendricks (inactive) | | 0-1-0 | United States | Jul 8, 2016 |
| Johny Hendricks (inactive) | Bigg Rigg | 13-8-0 | United States | Nov 4, 2017 |
| Josh Hendricks (inactive) | | 0-1-0 | United States | Nov 15, 2008 |
| Luis Henrique (inactive) | KLB | 2-4-0 | Unknown | Sep 22, 2018 |
| Danny Henry | The Hatchet | 2-2-0 | United Kingdom | Jul 11, 2020 |
| Victor Henry | La Mangosta | 4-2-0 (1 NC) | United States | Apr 5, 2025 |
| Jai Herbert | Black Country Banger | 4-5-1 | United Kingdom | Apr 18, 2026 |
| Dave Herman (inactive) | | 1-4-0 | United States | Jul 6, 2013 |
| Ed Herman (inactive) | Short Fuse | 13-12-0 (1 NC) | United States | Apr 15, 2023 |
| Jack Hermansson | The Joker | 11-8-0 | Sweden | Nov 22, 2025 |
| Alexander Hernandez | El Gran Chango | 11-8-0 | United States | Oct 3, 2026 |
| Anthony Hernandez | Fluffy | 9-4-0 | United States | Aug 22, 2026 |
| Carlos Hernandez (inactive) | | 3-4-0 | United States | May 17, 2025 |
| Luis Hernandez | The Stache | 1-0-0 | United States | Sep 26, 2026 |
| Noe Hernandez (inactive) | | 0-1-0 | Unknown | May 15, 1998 |
| Nohelin Hernandez (inactive) | Suave | 0-2-0 | United States | Sep 28, 2019 |
| Ramiro Hernandez (inactive) | Junior | 0-2-0 | Unknown | Jan 25, 2014 |
| Geane Herrera (inactive) | La Pulga | 1-3-0 | United States | Nov 26, 2016 |
| Paul Herrera (inactive) | The Bone Crusher | 0-1-0 | United States | Feb 16, 1996 |
| Felice Herrig (inactive) | Lil Bulldog | 5-5-0 | United States | Jun 4, 2022 |
| Heath Herring (inactive) | The Texas Crazy Horse | 2-3-0 | United States | Aug 9, 2008 |
| Jon Hess (inactive) | | 1-0-0 | Unknown | Apr 7, 1995 |
| Clint Hester (inactive) | Headbussa | 4-3-0 | United States | Apr 23, 2016 |
| Jimy Hettes (inactive) | The Kid | 3-3-0 | United States | Apr 18, 2015 |
| Jay Hieron (inactive) | The Thoroughbred | 0-4-0 | United States | Feb 2, 2013 |
| Brady Hiestand | Bam Bam | 4-1-0 | United States | Sep 26, 2026 |
| Jason High (inactive) | The Kansas City Bandit | 2-3-0 | United States | Jun 7, 2014 |
| Richie Hightower (inactive) | The Dirty Samurai | 0-1-0 | United States | Dec 8, 2007 |
| Angela Hill | Overkill | 14-16-0 | United States | May 30, 2026 |
| Corey Hill (inactive) | | 1-2-0 | United States | Dec 10, 2008 |
| Jamahal Hill | Sweet Dreams | 6-4-0 (1 NC) | United States | Jun 21, 2025 |
| Alvin Hines | Goozie | 0-2-0 | United States | Jul 18, 2026 |
| Branden Lee Hinkle (inactive) | The Iron Lion | 1-2-0 | United States | Jun 28, 2006 |
| Hatsu Hioki (inactive) | | 3-5-0 | Japan | May 9, 2015 |
| Kuniyoshi Hironaka (inactive) | | 1-3-0 | Japan | Apr 19, 2008 |
| Mizuto Hirota (inactive) | Pugnus | 1-5-1 | Unknown | Dec 1, 2018 |
| Vernon Ramos Ho (inactive) | | 0-1-0 | Unknown | Nov 21, 2015 |
| Matt Hobar (inactive) | The Crowbar | 1-2-0 | United States | Dec 6, 2014 |
| Bobby Hoffman (inactive) | The Truth | 0-2-0 (1 NC) | United States | Nov 2, 2001 |
| Sam Hoger (inactive) | The Alaskan Assassin | 2-3-0 | United States | Feb 3, 2007 |
| Josh Hokit | | 4-0-0 | United States | Jun 14, 2026 |
| Andrew Holbrook (inactive) | | 2-3-0 | United States | Sep 2, 2017 |
| Chris Holdsworth (inactive) | | 2-0-0 | United States | May 24, 2014 |
| Kevin Holland | Trailblazer | 16-12-0 (1 NC) | United States | Apr 11, 2026 |
| Roger Hollett (inactive) | The Hulk | 0-2-0 | Canada | May 18, 2013 |
| Max Holloway | Blessed | 24-9-0 | United States | Jul 11, 2026 |
| Holly Holm (inactive) | The Preacher's Daughter | 8-7-0 (1 NC) | United States | Apr 13, 2024 |
| Rex Holman (inactive) | Big Dog | 0-1-0 | United States | Mar 3, 2007 |
| Joseph Holmes (inactive) | Uglyman Joe | 1-3-0 | United States | May 6, 2023 |
| Kurt Holobaugh (inactive) | The Hurt | 2-7-0 | United States | May 31, 2025 |
| Paddy Holohan (inactive) | The Hooligan | 3-2-0 | Ireland | Oct 24, 2015 |
| Mark Holst (inactive) | Boots | 0-2-0 | Canada | Oct 16, 2010 |
| Scott Holtzman (inactive) | Hot Sauce | 7-6-0 | United States | Dec 3, 2022 |
| Sabah Homasi (inactive) | | 0-3-0 | Unknown | Jan 20, 2018 |
| Mark Hominick (inactive) | The Machine | 3-4-0 | Canada | Nov 17, 2012 |
| Barb Honchak (inactive) | Little Warrior | 0-2-0 | United States | Jul 6, 2018 |
| Satoshi Honma (inactive) | | 0-1-0 | Japan | Apr 14, 2000 |
| David Hood (inactive) | | 0-1-0 | Unknown | Sep 8, 1995 |
| Dan Hooker | The Hangman | 14-11-0 | New Zealand | Sep 5, 2026 |
| Chase Hooper | The Dream | 9-5-0 | United States | Jul 18, 2026 |
| Dakota Hope | Huracan | 0-1-0 | United States | Apr 4, 2026 |
| Darrell Horcher (inactive) | The Saint | 1-3-0 | United States | Nov 30, 2018 |
| Moti Horenstein (inactive) | | 0-2-0 | Unknown | Jul 27, 1997 |
| Yoshinori Horie (inactive) | | 0-1-0 | Unknown | Jul 27, 2019 |
| Kyoji Horiguchi | Karate Kid | 9-2-0 | Japan | Jun 20, 2026 |
| Jeremy Horn (inactive) | Gumby | 6-7-0 | United States | Jan 17, 2009 |
| Jamey-Lyn Horth | | 4-3-0 | Canada | Apr 18, 2026 |
| Matt Horwich (inactive) | Suave | 0-2-0 | United States | Apr 1, 2009 |
| Saeed Hosseini (inactive) | | 0-1-0 | United States | May 30, 1997 |
| Jeff Hougland (inactive) | Hellbound | 1-2-0 | United States | Nov 10, 2012 |
| Brian Houston (inactive) | B-Hue | 0-2-0 | United States | Jan 15, 2014 |
| Harold Howard (inactive) | | 1-2-0 | Canada | Sep 8, 1995 |
| John Howard (inactive) | Doomsday | 7-7-0 | United States | Dec 10, 2015 |
| Shane Howell (inactive) | | 0-2-0 | United States | Jan 18, 2015 |
| Carlos Huachin (inactive) | Perro Malo | 0-2-0 | Peru | Sep 21, 2019 |
| Austin Hubbard (inactive) | Thud | 4-8-0 | United States | Aug 23, 2025 |
| Roger Huerta (inactive) | El Matador | 6-2-0 | United States | Sep 16, 2009 |
| Jeff Hughes (inactive) | Lights Out | 0-3-0 (1 NC) | United States | Sep 26, 2020 |
| Mark Hughes (inactive) | | 1-0-0 | United States | Nov 17, 2000 |
| Matt Hughes (inactive) | | 18-7-0 | United States | Sep 24, 2011 |
| Sam Hughes | Sampage | 6-6-0 | United States | Mar 14, 2026 |
| Victor Hugo (inactive) | Striker | 1-1-0 | Brazil | Oct 26, 2024 |
| James Te Huna (inactive) | | 5-5-0 | New Zealand | Mar 19, 2016 |
| Harry Hunsucker (inactive) | The Hurricane | 0-3-0 | United States | Aug 20, 2022 |
| Mark Hunt (inactive) | Super Samoan | 8-8-1 (1 NC) | New Zealand | Dec 1, 2018 |
| Alex Hunter (inactive) | | 2-0-0 | United States | Oct 17, 1997 |
| Abdul Hussein | King | 1-0-0 | Lebanon | Jul 25, 2026 |
| Solomon Hutcherson (inactive) | King | 0-1-0 | United States | Jun 24, 2006 |