Joonas Korpisalo stopped 21 shots — saving his best for Utah’s final push — to earn his second shutout of the season.

“It feels pretty good, I’m not going to lie,” said Sacco, who grew up in Medford and cheers for the Bruins.

Boston (9-9-3) played one of its most complete games of the season. The Bruins were alert on the defensive end, crushed plays in the neutral zone, were perfect on the penalty kill (4 for 4), and their results came on the power play.

More importantly, they played with energy and enthusiasm from puck drop to final buzzer.

“A good effort all around from our guys. They really dug in,” Sacco said. “We obviously got some quick saves from Korpi when we needed them, especially towards the end there, but a good effort from our group tonight and we were looking for that. We were looking for passion and emotion in our club and we saw some of that tonight.”

The Sacco era started with a bang when defender Zadorov rattled Clayton Keller into the corner boards in the first minute. It not only got Keller’s attention, but also a garden crowd eager to erupt on just about anything.

It was Zadorov’s best game of the season. The crippled Russian delivered some monstrous hits and stayed out of the penalty box.

“Physical but under control, right? And he did a good job of staying in the defensive zone, not moving too much and protecting the front of our net,” Sacco said. “And that’s what we expect from him.”

The battle continued as Kastelic and Robert Bortuzzo traded blows at center ice in a quick match, with Kastelic landing a takedown.

As things settled down and the fans settled into their seats, the Bruins got the first of their three power plays in the first period.

Both units moved the puck well and landed several Grade A chances, but couldn’t put anything past Karel Vejmelka (30 saves)

Boston got two more shots on the power play (Jack McBain for Zadorov and Logan Cooley for beating Lohrei) and showed a lot of life.

David Pastrnak (one-timer), Justin Brazeau (wrister from the dot) and Morgan Geekie (snapper that Brazeau almost tipped in) had the best opportunities.

When the siren sounded, the Bruins, who preached shot volume this week, led in that category, 15-5, but the game remained scoreless.

Michael Carcone’s blind pass early in the second was picked off by Pastrnak and he took it coast to coast before being caught by McBain as he reached Vejmelka’s crease.

It was another sharp power play with the Bruins landing four shots, including a pair of Pastrnak one-timers from his office and a bid from Brad Marchand that got past Vejmelka but was swept by Ian Cole.

The action heated up in the second half of the second period and it was Boston’s struggling power play that lit the flame.

With Cooley suspended for holding Lindholm, the Bruins quickly went to work.

Pastrnak bombed another shot from the circle and Marchand snapped the rebound and it squirted to Lindholm, who slammed into the loose end just 20 seconds in for a 1-0 lead.

“Oh, that was huge,” said Lindholm, who looked to the sky as if to say “thank you” after his goal. “Obviously it’s been a couple of tough games or a stretch here for me. Obviously I haven’t been playing well enough and hopefully that can help a little bit and give me a little bit of confidence.”

With Garden still swinging from the target, Kastelic swung Bortuzzo again.

Just 14 seconds into the finish, the combatants crossed paths again and dropped the gloves for round 2. This time, Kastelic stunned Bortuzzo with a lightning right and landed several more before the two hit the ice, still fluttering at each other.

As Kastelic made his way to the box, his teammates stared at the Jumbotron and grinned as the replay of the fight played.

“I definitely feel like the guys in this room respect that a lot, which I appreciate and I’m just trying to make an impact as best I can in any way, shape or form,” Kastelic said. “I think you definitely feel the energy from the crowd and the fans, and we won and that’s the most important thing and hopefully I gave the guys some fuel.”

Korpisalo stood tall in the third as the descendants of the desert dogs barked. He made seven saves and was helped by a couple of saves.

Korpisalo (4-2-1) said he fed off the energy his teammates came out with.

“Of course,” he said. “And those couple fights that Kassie had. It just brings everyone into the game and the crowd was great today. All that. It electrified the whole team.”

Jim McBride can be reached at [email protected]. Follow him @globejimmcbride.