Cole Caufield scored twice, and Nick Suzuki had two assists for Montreal (8-13-3), which lost 4-3 at the New York Rangers on Saturday and has lost four of its past five (1-3-1). Cayden Primeau made 24 saves.
“I mean, this ceremony before, [and] anytime we come here, they give us a hard time,” Primeau said. “Just as we do. But yeah, they’re a hard team. … It’s hard to try to come back after trying to come back yesterday against two good teams, back to back.”
McAvoy gave the Bruins a 1-0 lead at 11:45 of the first period, skating through the right face-off circle before looping around the net and scoring with a wraparound.
“I’m looking at my angle to shoot, and I had enough speed where I thought if I can look and sell this, then I’m going to wrap,” McAvoy said. “You just make that decision and then go with it.”
Pastrnak pushed it to 2-0 at 12:40, finishing Pavel Zacha’s pass from behind the net with a one-timer.
Coyle extended it to 3-0 just 15 seconds later, lifting a backhand over Primeau’s stick from in front.
“You can’t help the other team, dig yourself in a hole,” Canadiens coach Martin St. Louis said. “It’s hard to play catch-up hockey on a back-to-back. It’s hard when you’re fresh, so we lacked a little bit of that tonight.”