Jake O'Brien (fighter)

Jacob Allen O'Brien (born September 25, 1984) is an American retired professional mixed martial artist who most recently competed in the Heavyweight division. A professional competitor from 2005 until 2012, he fought for the UFC, WEC, and DREAM.

Jake O'Brien
Born (1984-09-25) September 25, 1984 (age 37)
Indianapolis, Indiana, United States
Other namesIrish
Height6 ft 3 in (1.91 m)
Weight250.5 lb (114 kg; 17 st 13 lb)
DivisionLight Heavyweight
Fighting out ofIndianapolis, Indiana, United States
TeamIntegrated Fighting Academy
Years active2005–2012
Mixed martial arts record
By knockout7
By submission3
By decision5
By knockout2
By submission2
Mixed martial arts record from Sherdog


Born and raised in Indianapolis, Indiana, O'Brien attended Franklin Central High School where he competed in wrestling, football, and track and field. In wrestling, O'Brien was a three-time State Champion as a sophomore, junior, and senior, compiling an overall record of 152-9. O'Brien also earned four letters in football and one in track and field. O'Brien continued wrestling at Purdue University, and after redshirting his freshman year, posted a record of 14-18 in his sophomore season as the starting Heavyweight. However, this would be O'Brien's only year of wrestling at Purdue.[1]

Mixed martial arts careerEdit

Early careerEdit

O'Brien made his professional mixed martial arts debut in 2005 and compiled a professional record of 7-0 which included a 14-second knockout win in the WEC, before being signed by the UFC.

Ultimate Fighting ChampionshipEdit

O'Brien made his UFC debut at UFC Fight Night 6 on August 17, 2006, against Kristof Midoux and won via TKO in the second round. O'Brien followed this up with a unanimous decision victory at UFC 65 before facing Heath Herring at UFC Fight Night 8 on January 25, 2007. O'Brien picked up perhaps the biggest victory of his career, defeating the PRIDE veteran via unanimous decision (29–28, 30–27, 30–27).

In his next appearance, O'Brien faced former UFC Heavyweight Champion Andrei Arlovski and was handed his first professional loss via TKO in the second round. In his next fight, O'Brien was paired with future UFC Heavyweight Champion Cain Velasquez at UFC Fight Night: Silva vs. Irvin on July 19, 2008, and was defeated again via TKO, in the first round.

After two consecutive losses, O'Brien dropped down to the Light Heavyweight division and faced Christian Wellisch, who was also making his Light Heavyweight debut, at UFC 94 on January 31, 2009. O'Brien won via split decision. In his next appearance at UFC 100 on July 11, 2009, O'Brien faced future UFC Light Heavyweight Champion Jon Jones. O'Brien was defeated via guillotine choke submission in the second round.


After his departure from the UFC, O'Brien won two fights in independent promotions before being signed by the Japanese promotion DREAM.


O'Brien was expected to make his debut with the DREAM promotion on July 10 in a Light Heavyweight bout against former Strikeforce and DREAM Champion Gegard Mousasi at Dream 15. O'Brien failed to make weight, weighing in at 212 lbs therefore was given a 10% purse deduction as well as a yellow card at the start of the fight. O'Brien lost via guillotine choke submission in the first round.[2]

Mixed martial arts recordEdit

Professional record breakdown
19 matches 15 wins 4 losses
By knockout 7 2
By submission 3 2
By decision 5 0
Res. Record Opponent Method Event Date Round Time Location Notes
Win 15–4 Miodrag Petkovic Decision (unanimous) Flawless FC 1: The Beginning August 4, 2012 3 5:00 Chicago, Illinois, United States
Win 14–4 James Shaw Submission (arm-triangle choke) Indy MMA March 31, 2012 1 1:06 Indianapolis, Indiana, United States
Loss 13–4 Gegard Mousasi Submission (standing guillotine choke) DREAM 15 July 10, 2010 1 0:31 Saitama, Japan DREAM Light Heavyweight GP Semifinal; Catchweight bout 212 lb due to O'Brien missing weight.
Win 13–3 Toni Valtonen Decision (unanimous) Fight Festival 27 March 13, 2010 3 5:00 Helsinki, Uusimaa, Finland
Win 12–3 Dave Hess Submission (kimura) MMA Big Show: Triple Threat February 20, 2010 2 4:24 Florence, Indiana, United States
Loss 11–3 Jon Jones Submission (guillotine choke) UFC 100 July 11, 2009 2 2:43 Las Vegas, Nevada, United States
Win 11–2 Christian Wellisch Decision (split) UFC 94 January 31, 2009 3 5:00 Las Vegas, Nevada, United States Light Heavyweight debut.
Loss 10–2 Cain Velasquez TKO (punches) UFC Fight Night: Silva vs. Irvin July 19, 2008 1 2:02 Las Vegas, Nevada, United States
Loss 10–1 Andrei Arlovski TKO (punches) UFC 82 March 1, 2008 2 4:17 Columbus, Ohio, United States
Win 10–0 Heath Herring Decision (unanimous) UFC Fight Night: Evans vs. Salmon January 25, 2007 3 5:00 Hollywood, Florida, United States
Win 9–0 Josh Schockman Decision (unanimous) UFC 65: Bad Intentions November 18, 2006 3 5:00 Sacramento, California, United States
Win 8–0 Kristof Midoux TKO (referee stoppage) UFC Fight Night: Sanchez vs. Parisyan August 17, 2006 2 0:52 Las Vegas, Nevada, United States
Win 7–0 Pat Harmon Technical Submission (rear-naked choke) UFL: United Fight League June 23, 2006 1 3:46 Indianapolis, Indiana, United States
Win 6–0 Antoine Hayes TKO (punches) LOF: Legends of Fighting 6 April 7, 2006 1 N/A Indianapolis, Indiana, United States
Win 5–0 Jay White KO (punch) WEC 19 March 17, 2006 1 0:14 Lemoore, California, United States
Win 4–0 Johnathan Ivey TKO (punches) LOF: Legends of Fighting 4 January 20, 2006 1 N/A Indianapolis, Indiana, United States
Win 3–0 Anthony Ferguson TKO (punches) LOF: Revolution January 7, 2006 1 N/A Plainfield, Indiana, United States
Win 2–0 Paul Bowers TKO (punches) IFC: Integrated Fighting Classic 3 June 21, 2005 1 N/A Indianapolis, Indiana, United States
Win 1–0 Chris Clark TKO (referee stoppage) MT: Madtown Throwdown 3 May 21, 2005 1 N/A Madison, Wisconsin, United States


  1. ^ "Archived copy". Archived from the original on 2016-11-26. Retrieved 2014-05-29.{{cite web}}: CS1 maint: archived copy as title (link)
  2. ^ Gegard Mousasi vs. Jake O'Brien in the Works for DREAM.15

External linksEdit