He started his playing career at Greenock Morton before moving on to Newcastle United , Aberdeen , Hamburg , Celtic , IK Brage and Reading and won the Scottish PFA Players ' Player of the Year in 1982 as well as four caps and two goals for the Scotland national football team . He started his playing career at Greenock Morton before moving on to Newcastle United â `` where he scored 36 goals in 99 appearances , including a fantastic last minute winner against Bradford , Aberdeen , Hamburg , Celtic , IK Brage and Reading and won the Scottish PFA Players ' Player of the Year in 1982 as well as four caps and two goals for the Scotland national football team .