His league and championship career with the Kerry senior team lasted three seasons, from 1996 to 1998.
[1] O'Shea made his debut on the inter-county scene at the age of sixteen, when he was selected for the Kerry under-21 team.
By this stage, he had also joined the Kerry senior team, making his debut during the 1995-96 league.
Subsequent to relocating to Australia, O’Shea embarked upon a career in Australian Rules Football playing the "AFL 9s" version of the game.
However, an inability to adapt to the oval ball and a run of calf injuries has limited his impact at this level.