Usually lining out as a half-back, he was a member of the Kilkenny team that won the 1909 All-Ireland Championship.
[1] Delahunty played his club hurling with Mooncoin and enjoyed much success in a twelve-year career.
Delahunty ended his club career with three successive championship titles between 1916 and 1918.
[citation needed] After missing Kilkenny's Leinster final defeat of Laois, Delahunty was added to the team for the subsequent All-Ireland final against Tipperary.
[citation needed] Delahunty was married to Anastasia (née Fewer) from 1926 until her death in 1963.