The 1979–80 Toronto Maple Leafs season was the 63rd season of the franchise, 53rd season as the Maple Leafs. In July 1979, Leafs owner Harold Ballard brought back Punch Imlach, a longtime friend, as general manager. Imlach traded Lanny McDonald to undermine team captain Darryl Sittler's influence on the team. The McDonald trade sent the Leafs into a downward spiral. They finished five games under .500 and only made the playoffs due to the presence of the Quebec Nordiques, a refugee from the WHA, in the Adams Division.