He was a Carlow SHC runner-up in 2022 after Bagenalstown Gaels was defeated by St Mullin's in the final.
[2] MccUllagh began his inter-county career with Carlow as a member of the minor team in 2019.
He was part of the team that beat Meath to claim the Leinster MH Shield title in what was his final game in the grade.
[3] He was immediately drafted onto the under-20 team, however, his three seasons in this grade ended without success.
McCullagh claimed a Joe McDonagh Cup winners' medal after a 2–29 to 1–31 defeat of Offaly in the 2023 final.