The 1979-80 New York Islanders season was the eighth in the franchise's history. It involved winning the Stanley Cup. During the season, the Islanders dropped below the 100-point mark for the first time in five years, earning only 91 points.
Before the playoffs, Torrey made the difficult decision to trade longtime and popular veterans Billy Harris and defenseman Dave Lewis to the Los Angeles Kings for second line center Butch Goring. Goring's is often called the "final piece of the puzzle": a strong two-way player, his presence on the second line ensured that opponents would no longer be able to focus their defensive efforts on the Isles' first line of Bossy, Trottier and Clark Gillies. Contributions from new teammates, such as wingers Duane Sutter and Anders Kallur and stay-at-home defensemen Gord Lane and Ken Morrow (the latter fresh off a gold medal win at the 1980 Olympics), also figured prominently in the Islanders' playoff success.