Irish scrum-half known primarily for his play with Munster. He also earned two-dozen caps for the Irish national team between 2007 and 2012, but a move to the London Irish reduced his opportunities to play for his native country.
He played at Christian Brothers College and University College Cork. He was a member of the U21 Irish squad in 2004 before making his senior debut with Munster the year later.
He grew up as a talented hurler, winning an All-Ireland title with Cork in 2001. He founded the luxury watch brand Told & Co in 2015.
His father is Seanie O'Leary, who won four All-Ireland titles hurling for Cork between 1971 and 1984.
He and Conor Murray have played together on Munster.