The 22-year-old center, a restricted free agent, had NHL career highs in assists (19) and points (28) in 68 games with the Panthers last season.
"At the end of the year I kind of showed that I could take on more of a role," McCann told the Panthers website. "This year I feel like I've earned the coaches trust. I'm just looking to build on it some more and be used in every situation I can be used in."
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The Vancouver Canucks selected McCann in the first round (No. 24) of the 2014 NHL Draft. He has 53 points (19 goals, 34 assists) in 166 NHL games with the Canucks and Panthers, who acquired him in a trade May 25, 2016.
"Jared is a versatile two-way centerman who possesses excellent speed and suits our team well," Panthers general manager Dale Tallon said. "He has improved his game during his time with our organization and we look forward to him taking the next step in his development with the Panthers."
