Born in Radcliffe, Lancashire, Don attended the Radcliffe Secondary Modern School and played for Lancashire Schools and the Whitefield District team. Was spotted and was involved in trials for England Boys at Seaham Harbour. McAllister had a trial for Coventry before signing for Bolton as an apprentice and then as a full pro in June 1970, working his way into the first team after progressing through their youth system.
After Tottenham he moved to Charlton Athletic and then tried his luck in Portugal with Vitoria Setubal.
Don also had spells with US soccer sides Washington Diplomats and Tampa Bay Rowdies.
His final club was Rochdale, where he played as a non contract player in 1984.
Lived in Sydney, Australia since 1990 and was a national sales manager for a finance company and an advisor on international investments and insurance.
Enjoys fishing and golf in his spare time.