He played hurling and Gaelic football with his local club St Mary's and was a dual player with the Cork senior inter-county teams in the 1910s and 1920s.
[citation needed] O'Halloran first came to prominence on the inter-county scene as a member of the Cork senior hurling team in 1915.
That year he won his first Munster winners' medal following a victory over Clare in the provincial final.
With nine minutes left in the game John Carroll scored the winning goal for Laois.
[2] After a period in the wilderness Cork bounced back in 1919 with O'Halloran collecting a third Munster winners' medal following a provincial final defeat of Limerick.
A goal blitz by Joe Phelan, Jimmy Walsh and Mick Neville gave Dublin a 4-9 to 4-3 victory.