Not a bad way to celebrate, he figured.
"It was everything you dreamed of as a kid," Grzelcyk said. "It was not that cold out, dark and a light snowfall. Everything just matched up perfectly. We won the game in overtime. It was kind of exactly how you drew it up is what happened."
That game was wild, a 6-5 overtime comeback for Belmont Hill School of Belmont, Massachusetts, on Jan. 5, 2010, when Grzelcyk contributed an assist, four days after the Boston Bruins defeated the Philadelphia Flyers 2-1 in overtime in the 2010 NHL Winter Classic on the same rink.
The Bruins defenseman will get another chance to take the ice at Fenway Park, this time as part of the 2023 Discover NHL Winter Classic on Monday (2 p.m. ET; TNT, TVAS, SN) when Boston takes on the Pittsburgh Penguins.
"You see it coming earlier in the year, you get really excited," Grzelcyk said. "We always have really tight matchups with Pittsburgh, too, so that always makes for a fun environment. It's one of those things where people definitely request tickets for that one. That's circled on the calendar before the season even starts."
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Grzelcyk, who grew up in Charlestown, Massachusetts, won't be the only player revisiting 2010 memories when the Bruins and Penguins take the ice Monday. In addition to centers Patrice Bergeron and David Krejci -- the only remaining players from the home team who skated in the 2010 NHL Winter Classic -- another two players got to experience pieces and parts of the rinks in the storied Boston ballpark 13 years ago.
Three days after Grzelcyk played with Belmont Hill at Fenway Park, there was another historic game that took place there. It was the 248th all-time meeting between the Boston College and Boston University hockey teams, this time in an all-new setting, with BU winning 3-2.
Penguins defenseman Brian Dumoulin was there, playing for Boston College, just months into his freshman year. He played there again in 2011, against Northeastern, as Frozen Fenway gained steam.
"First year, I'd say, it was a little more special," Dumoulin said. "It was the first year there had done it. … That one, that was a cool, cool atmosphere. That was a fun one to play in. Second one was great because we won. Both very memorable."
There were also some quirks that Dumoulin recalled, feelings that aren't exactly the typical game day NHL experience.
"You feel like the stands are so far away from you," he said. "You almost don't feel like there's a crowd. You almost feel like it's just you guys out there playing."