King first played hurling to a high standard as a student at St Brendan's Community School in Birr.
[3] After progressing through the juvenile and underage ranks with the Carrig & Riverstown club, King made his senior team debut in 2022.
[5] King first appeared on the inter-county scene during an unsuccessful tenure with the Offaly minor hurling team.
[7] King was again eligible for the grade in 2024 and collected a winners' medal after beating Tipperary by 2–20 to 2–14 in the All-Ireland final.
[8] King made his senior team debut in defeat by Waterford during the 2024 National Hurling League.