Many wearing orange and black on the ice had something to prove Monday night.
Goalie Frederik Andersen, subjected to watching the past two opponents combine for 10 goals, stopped 32 shots.
Forward Matt Beleskey, best known before this season as a physical presence, surpassed his career-high goal total with his 12th — the game-winner — early in the third period.
And Devante Smith-Pelly, in a position change to center, scored a late second-period goal to justify his willingness to adjust and learn.
"If we play the way we play for 60 minutes, we're going to be in a good spot every night," Beleskey said. "There are adjustments against a team like Boston, but we have to focus on our game."
The sharpest focus came from Andersen, who was removed from Saturday's 6-4 loss in San Jose after surrendering five goals on 19 shots. His backup, Jason LaBarbera, got hurt in the game, and minor league call-up Igor Bobkov arrived after Monday's morning skate.
It was Andersen or bust against the returning President's Trophy winners, who were 4-1-1 in their six games before Monday.
"Went back to stopping one puck at a time … it was a great response by the team," Andersen said. "Hate losing, but you get another chance."
After Andersen stopped all 13 shots he faced in the first period, Boston's pressure intensified in the second, and the Bruins (14-10-1) opened scoring when center Brad Marchand was left unattended in rebounding a shot 10:20 into the period.
The Ducks (15-6-5) responded just 57 seconds later when defenseman Sami Vatanen rebounded Patrick Maroon's shot off Boston goalie Tuukka Rask.
Vatanen saw the puck carom back off his skate before rushing to set his stick on it and beat Rask to his left, delivering a sly look to teammates on the Anaheim bench.
Andersen stood firm, denying Joe Morrow's breakaway chance as the Bruin exited the penalty box just as his team forced a takeaway.
"You enjoy it for a second, then take it back to the next shot," Andersen said.
He was rewarded by Smith-Pelly, who found the best thing to do in his conversion to center was to hold out his stick with one hand.
Smith-Pelly deflected in a shot from defenseman Cam Fowler with 21.8 seconds left in the second, giving the Ducks a 2-1 lead they didn't relinquish.
"Getting better," Smith-Pelly said. "I just reached and got a little of a touch on it, tried to get my stick somewhere near it."
Insurance was provided by Beleskey, who, in his contract year, has already scored more than he did in his previous best, 2009-10.
Off a Ryan Getzlaf face-off win, Beleskey blasted a shot between two Bruins, past Rask's outstretched glove.
"You shoot the puck enough with a good shot, and good things are going to happen," Ducks Coach Bruce Boudreau said of Beleskey. "He's feeling like he can score."