Career
Club
O'Brien played his club hurling with the famous Glen Rovers team on the north side of Cork city and enjoyed much success. Inter-county
O'Brien's inter-county career was a short one, however, he enjoyed much success. After a period in the wilderness the Cork team bounced back in 1952 with O'Brien capturing a Munster winners' medal following a defeat of three-in-a-row All-Ireland champions Tipperary in the provincial decider.
Dublin provided the opposition in the subsequent All-Ireland final, however ‘the Dubs’ were completely outclassed by Cork on that occasion. O'Brien's inter-county hurling career came to an end following this triumh.