He represented Dublin from 1943 to 1953 in hurling and played in the All-Ireland Final of 1948 scoring a goal and also played in the 1946 National League Final.
Seán had a Sunday night radio programme on Raidió Teilifís Éireann (RTÉ) entitled Gaelic Sports Results, which was the longest running continuously broadcast radio feature in the world. He took over the show in place of his father in 1953 and retired after the broadcast of 8 May 2011, fifty-eight years later. The Gaelic Sports Results programme had a worldwide audience amongst the Irish diaspora through satellite and web broadcasting. He began his media career with The Evening Press and continued until its closure in 1995. Seán Óg died on Sunday 17 February 2013 aged 89.