With Carlo sidelined for much of the third period on Thursday night and the right side of the B's defense corps further depleted, Charlie McAvoy took on even more responsibility, finishing the night with a game-high 29:11 of ice time - nearly five minutes more than any other player in the game - and six hits and a team-high five blocked shots.
McAvoy also picked up the helper on Brad Marchand's overtime winner after he skated the length of the rink and delivered a silky, subtle feed to the winger at the Islanders blue line as he went to Boston's bench for a change.
"Obviously, he's becoming an elite player in this league and the playoffs don't bother him," said Cassidy. "Some guys get nervous or shy away from the moment. He's not one of those guys. Probably what makes him a great player, this time of year. His game has grown, he's obviously still a young defenseman knowing he can get better and what he can get away with and I think he just gets more comfortable every year.
"And obviously, when a guy goes down - I think there was a message that resonated with everyone. I think it was [Patrice Bergeron] who said it, 'We play for one another, we pick each other up.' Brandon's a very popular teammate, and that's directed basically at everybody. In Charlie's case, he's directly impacted, because it means it's going to be more minutes for him and probably [Connor] Clifton as well in that regard.
"He's going to try to play and try to drive the game no matter what, whether a guy is hurt or not, no matter how many minutes he plays. That's just who he is. He impacted the game in many ways [Thursday] night offensively. And the last goal - carrying the mail through the neutral zone, making a good play physically with a good hit on [J.G.]Pageau after they had hit Pasta hard. He responded well there. Big blocked shots in the PK.
"Good for Charlie. Teams that tend to advance have that type of D that can have those types of minutes, play in every situation. And we certainly have one in him."