 On April 10, Marsh appeared in his first playoff game, earning no points in a 4-1 loss to the Toronto Maple Leafs.Overall, he played in two post-season games, being held pointless, as the Flames lost to Toronto.During the third game of the 1979-80 season, Marsh scored his first career NHL goal, against Phil Myre of the Philadelphia Flyers in a 9-2 Flames victory.