Harper played his first 10 seasons with the
Montreal Canadiens. He joined the team in 1962. The Kings made the playoffs twice in his tenure there, but each time got bounced in the first round. After the 1974–75 season, on June 23, 1975, Harper, along with
Dan Maloney, was traded to the
Detroit Red Wings as part of the blockbuster trade that sent Hall of Famer
Marcel Dionne and
Bart Crashley to Los Angeles. Once again, he was named team captain for Detroit. He retired in 1981, at the age of 41. In 19 seasons in the league, Harper finished with only 254 points. For his career, he finished with 35 goals, 221 assists, 1,362 penalty minutes, and a plus/minus total of +169 (this statistic did not become official until the 1967–68 season, Harper's 6th in the league). ==Coaching career==