'The Tullow Tank' joined Naas yesterday.
Known as the Tullow Tank because of his formidable performances for Ireland and Leinster, Sean O'Brien finished his top tier playing career with London Irish earlier this year to return home to Tullow. There had been some speculation that he would turn out for his local club, where it all began.
At Leinster, he helped the team win four European titles, and was named ERC European Player of the Year for the 2010–11 season. On leaving Leinster, he played three season's for London Irish
Internationally, he played for Ireland for ten years, and toured twice with the Lions in 2013 and 2017.
He was one of five players shortlisted from the 24 Heineken Cup and 20 Amlin Challenge Cup teams that included Leinster teammates Naas' jamie Heaslip and Isa Nacewa.
He was ranked by the IRB among the five best players at the 2011 Rugby World Cup.
O'Brien was awarded the 2011 Guinness/Rugby Writers of Ireland Player of the Year.
This weekend, Naas play Highfield in Division 1B of the AIL at Forenaughts.
Head Coach Johne Murphy spoke to Eoin Beatty on this morning's Kildare Today programme.