Byrne Dunbar first played hurling to a high standard as a student at St Mary's CBS in Enniscorthy.
[1] He also represented the school in boxing and played underage soccer with Bray Wanderers and Wexford F.C..[2][3] At club level, Byrne Dunbar joined Ferns St Aidan's at juvenile and underage levels, before eventually progressing to the club's senior team.
He won a Wexford SHC medal after a 1–20 to 0–22 defeat of St Martin's in the 2022 final.
[4] Byrne Dunbar first appeared on the inter-county scene with Wexford as a member of the minor team in 2020.
[6] Byrne Dunbar first played for the senior team during the 2022 National Hurling League.