WEC 19: Undisputed
20060.0 / 10
20060.0 / 10
20070.0 / 10
20086.5 / 10
20080.0 / 10
20095.7 / 10
20095.5 / 10
20060.0 / 10
20066.9 / 10
20104.5 / 10
Jacob Allen O'Brien 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.
Male
1984-09-25
Indianapolis, Indiana, USA
