Jake O'Brien, Date of Birth, Place of Birth
TweetJake O'Brien
American martial artist
Date of Birth: 25-Sep-1984
Place of Birth: Indianapolis, Indiana, United States
Profession: mixed martial artist
Nationality: United States
Zodiac Sign: Libra 
About Jake O'Brien
- Jacob Allen O'Brien (born September 25, 1984) is a retired American 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.
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