Born in Drombane, County Tipperary, Riordan first arrived on the inter-county scene at the age of twenty-three when he first linked up with the Tipperary senior team.
Riordan was born in Drombane. Riordan first arrived on the inter-county scene at the age of twenty-three when he first linked up with the Tipperary senior team. Drombane was County Tipperary.