He helped the New York Islanders reach the NHL playoff semi-finals four times in five seasons from 1975 to 1979.

He played on Long Island until he was traded to the Los Angeles Kings on March 10, 1980, along with Dave Lewis for Butch Goring.

[2][3] Later that year, the Islanders won their first Stanley Cup of four in a row.

Harris was never part of a winning Cup team, but he is remembered for helping the Islanders grow from their initial days as an expansion franchise to a dominant team in the late 1970s and early 1980s.

Harris played more than 500 consecutive games for the Islanders before he was traded.