ST. LOUIS — Boston Bruins right wing David Pastrnak thinks he has seen a team go 4-for-4 on the power play before, although he wasn’t sure when or where.

“I've probably seen it somewhere,” Pastrnak said. “Probably the Russians. Maybe in the world championship. It was good. Torey (Krug) made great plays up top and he sees everything, and it was a big effort by him. “

While many teams have enjoyed big games with the man advantage, few have had a power play effort as important as the Bruins’ was in their 7-2 win against the St. Louis Blues in Game 3 of the Stanley Cup Final.

The Bruins’ perfect 4-for-4 night with the man advantage allowed them to claim a 2-1 lead in the best-of-seven Final and gave them their eighth win in their last nine playoff games. Game 4 is Monday in St. Louis.

“We know they have a dangerous power play and we’ve been flirting with danger here the whole series and it burned us tonight,” St. Louis coach Craig Berube said. “We’ve got to do a better job of killing (penalties). That’s why they won the hockey game.”

Defenseman Torey Krug had a goal and three assists in the game, and every point came in his role as a power-play point man.

“They were shooting the puck from the top a lot more,” Blues penalty killer Ryan O’Reilly said. “I think we might read it a bit better and collapse and be ready for that. A couple of times I think they caught us off guard with that shot and broke us down from there.”

Bruins center Patrice Bergeron also registered a goal and two assists for his first points of the series. Pastrnak had a goal and Brad Marchand had an assist. That line had been sputtering but Bruins coach Bruce Cassidy predicted they would break out in Game 3.

“I think we were taking what’s there,” Bergeron said. “I think maybe earlier we were forcing plays a little too much and tonight we put the puck on net and when you do that good things happen. But it was four different ways we scored, so I think we’re trying to take what’s in front of us instead of forcing it.”

With the city of St. Louis celebrating the first Stanley Cup Final game at home in 49 years, the Blues may have been too emotional in Game 3.

Berube ended up pulling rookie goalie Jordan Binnington after the Bruins’ fifth goal, the first time he was pulled in 52 starts this season.

“My confidence level (in him) is really high,” Berube said. “Five goals he allowed. He had seen enough. We just wanted to pull him and get him ready for the next game.”

The Blues believe they will be a different team in Game 4.

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“I got to be better,” Binnington said. “I got to do a better job giving my team a chance to win. They scored three goals in the first. That’s never good. They’re a good hockey team. We have to get back to our game, stay focused.”

Over the past nine games, the Bruins have outscored their opponents 41-16. They have scored four or more goals seven times in that span.

“I still think we haven’t played our best,” Pastrnak said. “But we are up 2-1 and we need to meet tomorrow, look at the video and get even better. That’s our focus in this group. We have a lot of good players. We know we can elevate more.”