"We are excited to announce that we have signed Miro to a long-term contract," said Nill. "Since joining us, it has been clear that Miro is part of a collection of young, rising stars that are now playing in the National Hockey League. As an organization, we truly feel that Miro has just scratched the surface of his ability and will be in the Norris Trophy discussion for years to come. On behalf of Tom Gagliardi, his family, and our organization, we want to thank Miro for his commitment to the team and we all look forward to watching him as he continues to evolve into one of the elite players of the game."
The defenseman has also made several appearances on the international stage with Team Finland. Heiskanen helped Finland win the gold medal at the 2016 World U18 Championship. He also propelled Team Finland to the silver medal with at the 2017 World U18 Championship with 12 points (2-10=12) in seven contests. Heiskanen's 10 assists ranked first among all tournament skaters, while he paced all defensemen with 12 points and a +8 rating to be named to the tournament All-Star Team and win the Best Defenseman award. Additionally, he has made two appearances at the World Junior Championship, one appearance at the World Championship and one appearance in the Olympics, all with Team Finland.