 Under the stewardship of Billy McNeill, the "Bhoys" won the league title in 1987–88, before falling behind Old Firm rivals Rangers in 1988–89, 1989–90, and 1990–91.Mathie joined Allan McGraw's Greenock Morton in the First Division in August 1991 in a £100,000 deal.He scored 23 goals in 1991–92 and 21 goals in 1992–93, to become the club's top-scorer for two consecutive seasons.