The Blues did not help their cause by giving the Bruins four straight power plays bridging the first and second periods. They talked before the series about the importance of staying out of the penalty box against the Bruins power play, which was an NHL-best 34.0 percent (17-for-50) in the Stanley Cup Playoffs entering the night and went 7-for-15 during a four-game sweep of the Carolina Hurricanes in the Eastern Conference Final.
St. Louis was able to kill off the first three power plays, but Boston cashed in on the fourth -- after Oskar Sundqvist was called for cross-checking Clifton with 8:56 remaining in the second period -- with a goal from defenseman Charlie McAvoy that tied the game 2-2 with 7:19 left in the second.
The Bruins went 1-for-5 on the power play. The Blues were 0-for-2.
"We went to the box too much," said forward David Perron, who took a tripping minor in the first period. "We lost our composure a little bit. We weren't able to get below the goal line enough. But I think we'll be a lot better next game."
The Blues will have to be to better to derail the Bruins, who have won eight straight playoff games, outscoring opponents 32-11, since trailing the Columbus Blue Jackets 2-1 in the second round.
St. Louis was the better team in the first period of Game 1, taking advantage of Boston's rust after it had 10 days off following its sweep of Carolina. After pressuring the Bruins in their end, Brayden Schenn gave the Blues a 1-0 lead by beating goalie Tuukka Rask with a shot from the inner rim of the right face-off circle 7:23 into the game.
But after Tarasenko's goal, which came on an open shot from the slot, the Bruins stepped up their pressure, and the Blues were unable to handle it.
"We just didn't get to our game at all," Schenn said. "We turned over pucks, didn't support each other, started flipping the puck a lot. We weren't making a whole lot of plays, and it forced us to defend a lot."
The 11 shots the Blues put on Rask after Tarasenko's goal were mostly from the outside with little traffic in front. With Rask playing as well as he has in the playoffs (13-5 with an NHL-best 1.85 goals-against average and .940 save percentage), that's not going to be good enough to win.
"Yeah, we've got to find a way to get more pucks towards him, get more bodies in front of him," Pietrangelo said. "We made it a little bit easy for him tonight, so we'll work at it tomorrow."