Facing the Leafs full offense the first time this year in optimal lineups, too! (Brown on the 4th line)
Matthews reached for a puck in the corner coming out from behind the net and Kronwall went to hit him, but Kronwall just caught his shoulder/arm and caught Matthews off balance and put him into the boards awkwardly. It would've been interference if Matthews hadn't played the puck. Luckily it looks like he's ok. Kronwall got a boarding penalty.