Pittsburgh Penguins goalie Tristan Jarry was replaced by Casey DeSmith in the first period of Monday’s Winter Classic matchup against the Boston Bruins after showing signs of discomfort. 

The two-time NHL All-Star headed back to the locker room with just under five minutes remaining in the period after showing signs of an apparent injury on his right side during the league’s 14th annual Winter Classic. 

Tristan Jarry takes the ice at the Winter Classic in Boston

Tristan Jarry of the Pittsburgh Penguins takes the ice prior to playing the Bruins in the Winter Classic at Fenway Park on Jan. 2, 2023, in Boston. (Gregory Shamus/Getty Images)

"After speaking with the Penguins training staff, Tristan Jarry heads back to the locker room and Casey DeSmith will come in to take over in goal with 4:30 left in the 1st period," the Penguins said on Twitter. 

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The Winter Classic at Fenway Park is scoreless after one period with the Penguins out shooting the Bruins 14 to 11. 

Tristan Jarry on the ice during the Winter Classic

Tristan Jarry of the Pittsburgh Penguins during the Winter Classic game on Jan. 2, 2023, in Boston, Massachusetts. (Brian Babineau/NHLI via Getty Images)

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The Penguins have a chance to break a four-game skid with a win over the Bruins. They are 1-3-2 in their last six games. 

"This is a lifetime experience for our guys," Pittsburgh coach Mike Sullivan said Friday, via NHL.com.  "I think we need to see that for what it is and embrace that moment and enjoy that moment. We also need to understand that there's business at hand and there's two points on the line."

Tristan Jarry during warm ups of the Winter Classic

Tristan Jarry of the Pittsburgh Penguins  warms up for the Winter Classic at Fenway Park on Jan. 2, 2023. (Joe Sargent/NHLI via Getty Images)

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"It's two points," Jarry added Friday. "It's another game where we could trend in the right direction. It's another step we could take. It's just a game we have to focus on trying to get two points."

Jarry did not return for the start of the second period and was ruled out for the remainder of the game.