Seth Jones came close to tying the game when his slap shot hit the left post after Monahan got a double minor for high-sticking Bedard with 22 seconds remaining.
The Blackhawks finished 0-for-7 on the power play and have not scored with the man-advantage through their first three games (0-for-14).
“It wasn’t just the PP, it was kind of our overall game,” Johnson said. “I think things weren’t going our way and then we started to get a little bit -- I don’t want to use selfish, but just trying to rely on our own skill instead of helping each other and making more of a team game. Sometimes when things aren’t going your way, you try to do that extra little bit too much. And when you do that, I find that’s when things go south pretty quick.”
Caufield put the Canadiens up 1-0 at 3:54 of the second period when he batted his own rebound out of the air and past Mrazek.
Tanner Pearson made it 2-0 at 7:56 on a shot past Mrazek’s glove from the top of the left circle for his first goal since being traded from the Vancouver Canucks in September.
“You always want to get the first one out of the way as early as you can and get the monkey off your back, per se,” Pearson said.