Boston Bruins Coach Bruce Cassidy confirmed that rookie defenseman Charlie McAvoy will not play Tuesday night against the Detroit Red Wings due to a lower-body injury.

Speaking after Monday’s morning skate at TD Garden, Cassidy didn’t offer many details on McAvoy’s injury, adding that the defeneman is set to be evaluated later that evening.

McAvoy did not participate in Monday’s practice, but was walking on his own during Boston’s annual team photo.

McAvoy, 20, suffered the injury during Saturday’s win over the Montreal Canadiens at TD Garden, logging just 37 seconds of ice time before exiting in the first period and never returning.

During his first shift, McAvoy appeared to be tripped up by the stick of Montreal forward Brendan Gallagher before hobbling over to the bench.

Just seconds before falling, he also collided awkwardly into the boards.

McAvoy has been a huge part in the Bruins’ resurgent season, scoring seven goals and adding 25 assists over 58 games while forming an effective top-pairing tandem with captain Zdeno Chara on the blue line.

Goaltender Tuukka Rask was a late scratch from Saturday’s win over the Canadiens due to a “very minor” injury, but the ailment seems to be still troubling him.

Cassidy said Rask is still nursing a lower-body injury and likely won’t start against the Red Wings.

Cassidy said Rask might be able to serve as backup to Anton Khudobin on Tuesday, but the team won’t have a definitive answer until Tuesday’s practice.

Rask has been strong this season – 26-11-4 with a 2.27 goals-against average and a .919 save percentage.

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