Maurice John Giblin Johnston (born 13 April 1963) is a Scottish football player and coach. Johnston, who played as a forward, started his senior football career with Partick Thistle in 1981. He moved to Watford in 1983, where he scored 23 league goals and helped them reach the 1984 FA Cup Final. In 1984 he joined Celtic and scored 72 goals in 128 matches, won the Scottish Cup in 1985 and the Scottish league championship in 1986. Johnston signed for Nantes in 1987. He returned to Glasgow with Rangers in 1989, becoming the second player to cross the Old Firm divide since World War II (Alfie Conn was first) and the first open Catholic to play for Rangers since World War I.