The Islanders and TVA Sports, the French-language network in Canada where he worked as a hockey analyst, confirmed Bossy died Thursday night. A team spokesperson said Bossy was in his native Montreal.
Bossy had said in October in a letter to TVA Sports that he had been diagnosed with lung cancer.
"My dad loved hockey, sure, but first and foremost he loved life," she said in a statement in French on behalf of the Bossy family. "Until the end of his journey, he hung on. He wanted to live more than anything."