The only certainty in an NHL player's life is that at some time, he won't be an NHL player anymore.
For some, the end is just a matter of the years catching up to him. For others, it's related to injuries. Still others may opt to play elsewhere -- or have the decision made for them. But while some players' skills may have eroded to the point that there's no question their time is done, others leave while they're still capable of being solid contributors, if not stars.
Here's a look at some of the best finales in NHL history:
Final season: 1986-87 (38 goals, 37 assists, 75 points in 63 games)
Bossy began what turned out to be his final NHL season having scored at least 50 goals in each of his first nine, helping the New York Islanders to four straight Stanley Cups and a fifth straight trip to the Final. At age 30 and coming off a 61-goal, 123-point season, he was on course to pass Gordie Howe as the greatest goal-scorer in NHL history.
But in '86-87, Bossy's back decided it no longer wanted to cooperate. He felt a twinge in the back at training camp, and the injury got worse during the season, forcing him to miss 17 games and hampering him in several others. He had a career-low 38 goals, then was able to play in just six of the Isles' 14 playoff games and scored only twice.