Here's the play:
Matthews confirmed he did go through protocol, and added that he didn't start to feel concussion symptoms until after the game and into the next day. He'll be a game-time decision for Saturday's matchup with the New York Rangers, which is Toronto's final game before the Christmas break.
The 20-year-old also missed five games in November with an upper-body injury, limiting him to just 26 games this season. In those contests, however, he's recorded 26 points, good enough to lead the Leafs.