Jack O'Neil
“The Maniac”
Nationality: United States
Weight Class: Heavyweight
Height: 6'0"
Weight: 226 lbs
Professional Record
| 18 fights | 4 wins | 14 losses |
|---|---|---|
| KO/TKOs | 3 | 8 |
| Submissions | 1 | 6 |
| Decisions | 0 | 0 |
Fight Details
| Result | Record | Opponent | Event | Date | Method | Referee | Round | Time |
|---|---|---|---|---|---|---|---|---|
| LOSS | 4 - 14 - 0 | James Shaw | LOF 44 - Against All Odds | January 21, 2011 | TKO (Punches) | 1 | 0:48 | |
| LOSS | 4 - 13 - 0 | Kyle Gibbons | PCF - Premier Cage Fighting 7 | September 03, 2010 | Submission (Punches) | 1 | 0:23 | |
| LOSS | 4 - 12 - 0 | Jeremy Carver | KOTC - The Renewal | June 20, 2009 | Submission (Punches) | 1 | 0:08 | |
| LOSS | 4 - 11 - 0 | Gerald Armfield | Premier Fight - Uprising | May 30, 2009 | TKO (Punches) | 1 | 1:28 | |
| WIN | 4 - 10 - 0 | Michael Asher | LOF 31 - Legends of Fighting 31 | April 10, 2009 | TKO (Punches) | 1 | 1:00 | |
| LOSS | 3 - 10 - 0 | Marven Lemock | LOF 30 - Rebirth | February 07, 2009 | Submission (Punches) | 1 | 0:35 | |
| LOSS | 3 - 9 - 0 | James Simon | LOF 28 - Warfare | October 24, 2008 | TKO (Punches) | 1 | 0:31 | |
| LOSS | 3 - 8 - 0 | Michael Asher | LOF 27 - Heatwave | August 29, 2008 | Submission (Choke) | 1 | 1:45 | |
| LOSS | 3 - 7 - 0 | Jimmy Jenkins | LOF 15 - Vengeance | April 27, 2007 | TKO (Punches) | 1 | 2:29 | |
| LOSS | 3 - 6 - 0 | Dustin Neace | LOF - Revolution 4 | April 13, 2007 | Submission (Choke) | 1 | 1:47 | |
| LOSS | 3 - 5 - 0 | Jesse Chilton | LOF 14 - Resurrection | March 23, 2007 | KO (Punches) | 1 | 0:36 | |
| LOSS | 3 - 4 - 0 | Jeremy Norton | LOF 11 - Total Chaos | December 08, 2006 | Submission (Guillotine Choke) | 1 | 3:08 | |
| LOSS | 3 - 3 - 0 | Mike Camp | Evolution 4 - Shockwave | August 26, 2006 | TKO (Submission to Strikes) | 1 | 1:13 | |
| WIN | 3 - 2 - 0 | Rex Spiker | Evolution 3 - Redemption | August 05, 2006 | Submission (Rear Naked Choke) | 1 | 2:05 | |
| WIN | 2 - 2 - 0 | Rex Spiker | Evolution 2 - Evolution 2 | July 15, 2006 | KO (Punch) | 1 | 0:13 | |
| LOSS | 1 - 2 - 0 | Jon Schalk | LOF 5 - Legends of Fighting 5 | February 24, 2006 | TKO (Punches) | 1 | N/A | |
| LOSS | 1 - 1 - 0 | Chris Price | LOF - Revolution 1 | January 07, 2006 | TKO (Punches) | 1 | N/A | |
| WIN | 1 - 0 - 0 | Brian Salada | BG 3 - Battle Ground 3 | December 09, 2005 | TKO (Punches) | 1 | N/A |
Upcoming Major Events
One Championship - One 173
Aug 01, 2025
UFC on ESPN 71 - Taira vs. Park
Aug 02, 2025
KSW 109 - Kuberski vs. Paczuski
Aug 09, 2025
UFC on ESPN 72 - Dolidze vs. Hernandez
Aug 09, 2025
One Championship - One Friday Fights 120
Aug 15, 2025
UFC 319 - Du Plessis vs. Chimaev
Aug 16, 2025
UFC Fight Night 257 - Walker vs. Zhang
Aug 23, 2025