- Name: T.J. O'Brien
- Pro MMA Record: 21-8-0 (Win-Loss-Draw)
- Nickname: The Spider
- Current Streak: 1 Loss
- Age: 32 | Date of Birth: 1987.01.01
- Last Fight: June 19, 2015 in MCC
- Weight Class: Featherweight | Last Weigh-In: 144.2 lbs
- Affiliation: Roundkick Gym
- Height: 6'2" (188cm) | Reach: 77.0" (196cm)
- Career Disclosed Earnings: $11,000 USD
- Born: Sacramento, California, United States
- Fighting out of: Des Moines, Iowa
Regional Rankings Rankings FAQ
T.J. O'Brien is ineligible for regional rankings due to inactivity.
Fighters must have at least one completed MMA bout in the past two years to be ranked.