AC Horsens (Superligaen)
#4 | Midfielder
October 20, 1988 (Age: 27)
Mount Sinai, New York
5' 9", 165 lbs (1.75 m, 75 kg)
After spending four years in the NCAA with Bucknell, O'Brien's college coach helped him set up a trial at Danish 1st Division club Vejle in the summer of 2010. Although the trial did not result in a contract, the midfielder was able to hook on with Blokhus FC, a club in Denmark's third tier.
At Blokhus, the midfielder found immediate success. O'Brien found the net 10 times as the club stormed to the 2nd Division West title and then emerged victorious in the promotion playoffs.
While O'Brien had an opportunity to stay with Blokhus for the 2011/12 campaign in the 1st Division, the Mount Sinai native also had a chance to trial with the Superliga's SønderjyskE. The top division club was impressed enough with O'Brien that they inked him to an 18-month contract shortly after his arrival.
After his contract expired with SønderjyskE, O'Brien signed with FC Nordsjælland and participated in the team's 2012-2013 Champions League campaign. Following O'Brien's brief stay with the Wild Tigers he would head to Odense BK.
In the summer of 2014 O'Brien signed a one-year contract with Austrian Budesliga side Wiener Neustadt.
O'Brien has not appeared for the US national team.