 During his half century, he scored seven boundaries off the struggling Mitchell Johnson.O'Brien missed most of the 2010 season after undergoing finger surgery in July; in his absence, David Murphy was Northamptonshire's first-choice wicket-keeper.In 2012, O'Brien signed a contract worth $80,000 with Khulna Royal Bengals represent them in the newly formed Bangladesh Premier League, a domestic t20 competition.