He played with Sydney club Eastern Suburbs in the years 1976, 1978–1979 and 1983–1988.
A Backrower, Mackay played in 94 first grade matches for Eastern Suburbs, and 21 for the Newtown Jets club.
His son Shawn was a member of Easts Jersey Flegg (U21) winning side in the 2002 season.
His son died 6 April 2009 from an infection following a motor vehicle accident.
This Australian rugby league football biography is a stub.