I thought Lafleur's career went downhill after he hurt his knee in 1980. After that he had a long series of injuries- pretty crazy actually if you look at his injury record. It was at the end of that long string of injuries that he finally fell off in 1982-83. He had injury shortened seasons the two previous seasons, but his per game numbers were still elite in 80-81 and very good in 81-82.
It's a shame he hurt his knee in 80 because an Islanders-Habs semis would have been tremendous, even with the Habs in a reduced state. There's a great peek at what could have been on Youtube near the end of the 79-80 season when the two teams clashed at the Forum:
Significant Injuries
Missed part of 1974-75 season with broken left index finger, an injury suffered when he was slashed by Darryl Sitler during Montreal's Feb. 12, 1975, game at Toronto. He did not return until Montreal's March 7, 1975, game vs. Washington. ... Missed part of 1979-80 regular season with strained ligament in knee, an injury suffered during Montreal's Feb. 19, 1980, game at Washington. He did not return until Montreal's March 6, 1980, game vs. Edmonton. ... Missed remainder of 1980 playoffs with bruised left knee, an injury suffered when he was kneed by Pat Boutette in Montreal's April 11, 1980, playoff game at Hartford. ... Missed start of 1980-81 season with pulled right hamstring, an injury suffered during Montreal's practice on Oct. 8, 1980. He did not make his 1980-81 season debut until Montreal's Oct. 18, 1980, game vs. Vancouver. ... Missed part of 1980-81 season with tonsillitis, diagnosed on Nov. 20, 1980. He did not return until Montreal's Nov. 29, 1980, game vs. Minnesota. ... Missed part of 1980-81 season with scratched right eyeball, suffered when he was caught by Charlie Simmer's errant high stick during Montreal's Dec. 30, 1980, game vs. Los Angeles. He did not return to action until Montreal's Jan. 10, 1981, game vs. Quebec. ... Missed part of 1980-81 season with bruised right ankle, an injury suffered when he blocked a shot by Dave Pichette during Montreal's Jan. 10, 1981, game vs. Quebec. He did not return until Montreal's Jan. 24, 1981, game vs. Philadelphia. ... Missed part of 1980-81 season with charley horse, an injury suffered when he was kneed by Denis Potvin during Montreal's March 17, 1981, game at N.Y. Islanders. While he was out with the injury, he suffered facial injuries in a March 24, 1981, car accident. He did not return until Montreal's April 3, 1981, game vs. Hartford. ... Missed part of Montreal's 1981 training camp with sprained back, an injury suffered during the 1981 Canada Cup. ... Missed part of 1981-82 season with eye injury, suffered when he was struck by Mark Hardy's errant stick during Montreal's Nov. 10, 1981, game at Los Angeles. He did not return until Montreal's Nov. 19, 1981, game vs. Quebec. ... Missed part of 1981-82 season with bruised bone in left foot, an injury suffered when he was hit by teammate Gaston Gingras' shot during Montreal's March 11, 1982, game vs. Chicago. He did not return until Montreal's April 3, 1982, game vs. Buffalo. ... Missed one game of 1982-83 season with injured right eye, suffered when he was facewashed by Dale Hunter's glove during Montreal's Oct. 11, 1982, game at Quebec. ... Missed part of 1982-83 season with broken right pinky toe, an injury suffered when he collided with Steve Payne during Montreal's Nov. 9, 1982, game at Minnesota. He did not return until Montreal's Dec. 4, 1982, game vs. Boston. ... Missed part of 1988-89 season with broken bone on the outside of his left foot, an injury suffered when he was hit by a shot during N.Y. Rangers' Dec. 10, 1988, game at Boston. The injury sidelined him for the Rangers' Dec. 17, 1988, game at Montreal -- which would have been his first homecoming -- and he did not return until the Rangers' Jan. 7, 1989, game at N.Y. Islanders. ... Missed part of 1989-90 season with bruised left ankle, an injury suffered when he was hit by a shot from teammate Iiro Jarvi during Quebec's Nov. 14, 1989, game vs. Winnipeg. He did not return until Quebec's Dec. 23, 1989, game vs. Buffalo. ... Missed part of 1989-90 season with broken left cheekbone, an injury suffered when he was checked from behind into the boards by Dean Kennedy in Quebec's Jan. 30, 1990, game vs. Buffalo. Lafleur's face slammed right into the glass on the play, and Quebec coach Michel Bergeron initially said the injury might be career-ending. Lafleur did not return untli Quebec's March 24, 1990, game vs. Toronto.