Brooks Laich added an empty-net goal in the final minute.
Carey Price made 29 saves for Montreal in his first full game of the preseason.
Price was solid after recovering from a knee injury sustained in last season's playoffs. He made key saves in the third period against Alex Ovechkin and Nicklas Backstrom.
The game was sloppy, with 12 minor penalties called — including each team being whistled for too many men on the ice in the first period.
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