The 23-year-old had seven goals and 17 points in 81 games last season as a rookie and led the team’s defencemen in even-strength ice time.
“Mike is an important part of our team’s young core and we are thrilled that he has decided to remain a Panther for the long-term,” said general manager Dale Tallon said in a news release. “He is a dynamic and intelligent defenseman with impeccable character and work ethic. Mike has developed into a difference maker on our blue line and will be an important player and leader for the Panthers for many years to come.”
A native of Pointe-Claire, Que., Matheson has also played for Canada in each of the last two world championships. He has three goals and 13 points in 20 games, winning gold and silver medals in respective tournaments.