The Maple Leafs' speed has proven to be a challenge for the Bruins defense, but Cassidy said he believes that Grzelcyk can help tame that style of play.
"He's got the foot speed to be able to match that part of the game, when they take off," said Cassidy. "Just like they counter, we've been a pretty good transition team all year and can strike off turnovers or punted pucks if they're not structured. So, he adds to that."
Holden stepped up in Grzelcyk's absence and played 12:25 in Game 3, while picking up an assist to go along with a plus-1 rating, but Cassidy feels the team can use certain aspects of Grzelcyk's game, especially when it comes to handling the puck.
"He's a guy who can get it up in a hurry, doesn't always have to go D-to-D, gets around it, it's gone, usually delivers a good pass," said Cassidy. "That's the part of the game that we missed the other night. Nick was fine, but that's Grizz's strength. I think he's defended very well for a young guy in the league, for a guy that's 175 pounds. He's done a real good job figuring out how to defend, so we missed him the other night."