His seven Game 7 wins are the most among those playing Thursday, and his eight previous Game 7s are tied with Penguins teammate Chris Kunitz for most among those who will play Thursday.
"I've been fortunate to be on the right side a lot of times," said Hagelin, who has two assists in his eight Game 7s.
Hagelin's run of success in Game 7s began during the first playoff series of his NHL career, which, by coincidence, was against the Senators. The Rangers won 2-1 at home.
Hagelin and the Rangers won two Game 7s that year, another in 2013 and two more on their way to the Stanley Cup Final in 2014. His personal Game 7 record reached 6-0 when he and the Rangers won 2-1 in overtime against the Washington Capitals in the second round in 2015. His run ended in the Eastern Conference Final with a 2-0 loss in Game 7 against the Tampa Bay Lightning.
After the Penguins acquired Hagelin in a trade with the Anaheim Ducks last season, he helped the Penguins defeat the Lightning 2-1 in Game 7 of the Eastern Conference Final. This season the Penguins defeated the Capitals 2-0 in Game 7 of the second round, but Hagelin didn't play because of a lower-body injury.
Now he's healthy again and looking forward to another Game 7 opportunity.
"These are the games you want to play in," Hagelin said. "I'm very happy and proud to be a part of such a great team as this and the teams I've been part of in the past. ... We're looking forward to this challenge that we've got ahead of us [Thursday]. I think we're an excited group. We're very excited."