"Yeah, the puck's going in, I guess," said Bergeron, who normally is known for his defensive skills. "There's not much to say about it. It's just, you get those chances sometimes during the year and it doesn't go in. And now it is. Obviously, it's great any time I can chip in offensively and keep my two-way game."
Tuukka Rask made 28 saves for his league-best seventh shutout, helping Boston rank first in the NHL with 149 non-shootout goals allowed. He's 8-0-1 with a 1.31 goals-against average since losing to Washington (34-27-12) earlier this month.
"You always feel better about yourself when you play good against good teams like that," Rask said. "I don't think they got too many chances."
Rask recorded one of his shutouts by making 16 saves in a 3-0 win over the Capitals on March 6. He had gone 0-3-3 with a 3.55 GAA in his first six career regular-season appearances against Washington.
Boston is beginning a four-game road trip and plays Philadelphia on Sunday, so it's unclear if Rask or backup Chad Johnson will start the first of the back-to-back set.
Alex Ovechkin, two shy of his fifth 50-goal season, scored twice on Rask in the first meeting. He netted a pair of power-play goals to stake Washington to a first-period lead against Los Angeles on Tuesday, but it let a crucial point slip away in a 5-4 shootout loss.
The Capitals are 4-0-2 over their last six as they battle Columbus, Detroit and Toronto for the conference's two wild-card spots.
"There's no excuse. We have to find a way to win when we are up two goals," forward Marcus Johansson said. "It hurts a lot. You never know when it comes down to it -- in or out (of the playoffs) by one point."
Nicklas Backstrom recorded an assist before leaving in the second period after a hard check from Kings defenseman Drew Doughty. Backstrom was back at practice this week and said he "absolutely" will play against Boston.
Defenseman Jack Hillen is questionable after suffering an upper-body injury in a collision with Ovechkin. Hillen missed 60 games earlier this season due to a fractured tibia.
"You've got 19 other guys that have got to do the job," coach Adam Oates said. "We've got plenty of guys that can do the job."
Washington plays at Nashville on Sunday, so its goaltending situation also is unclear. Either Jaroslav Halak, who made 32 saves Tuesday, or Braden Holtby will get the start.