After successes in a number of Saturday and Sunday Leagues in 1910 and 1911, the club won the County Junior Championship in 1912.

O'Leary Hall amalgamated with the nearby St Finbarr's National Hurling & Football Club in 1919.

That same year the club donated their now defunct kit to the Cork senior hurling team who were due to play Dublin in the All-Ireland final.

[1][2] In the week leading up to the game, British forces broke into the county board offices on Maylor Street in the city centre and seized the regular Cork jerseys.

Following this win Cork decided to wear the 'lucky' red jerseys in their future games.