At club level he played with St. Mary's Clonmel and was also a member of the Tipperary senior hurling team.
Mullins played juvenile and underage hurling with the St. Mary's club in Clonmel.
[1][2] Mullins's performances for the club brought him to the attention of the Tipperary minor team selectors and he lined out in goal for their All-Ireland Minor Championship success in 1976.
He progressed onto the Tipperary under-21 team and won consecutive All-Ireland Under-21 Championship titles from 1979 and 1980.
Mullins lined out as sub-goalkeeper with the Tipperary senior hurling team for one season.