Sean O’Brien announced on Friday April 8 that he will retire at the end of the season at the age of 35 after 56 national team caps and a victory in the Six Nations Tournament in 2015. Sean O’Brien also played 11 years for Leinster before joining the London Irish, his current team. O’Brien was also named European Player of the Year in the 2010/2011 season. “ I’m happy to have had so many great moments in my career. At international level, I am honored to have been capped 56 times for Ireland “said the player in a press release.