T.J. O'Brien is a 39-year-old mixed martial artist from United States with a professional record of 0-0-0.
Standing 0ft 0in tall, T.J. O'Brien competes in the Lightweight division.
T.J. O'Brien has 0 wins, 0 losses, and 0 draws in their professional career. Their wins include 0 knockouts/TKOs, 0 submissions, and 0 decisions.
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