The Bruins snapped their five-game losing streak in Pittsburgh on Saturday. But though they managed to grab the two important points and they played one of their better all-around games, it was hardly a feel-god win.

In the B’s 3-2 win over the Penguins that went down to the final white-knuckle seconds, captain Brad Marchand was lost to an unspecified injury in the first period, making it the third straight game they had to finish down a man short.

Joonas Korpisalo  (29 saves) picked up the win in is first start in nearly a month and David Pastrnak picked up a couple more points in the win.

After Trent Frederic was injured on Tuesday and Oliver Walstrom was shipped to Providence on Friday, the B’s dipped into Providence to bring up forwards Georgii Merkulov and Jeffrey Viel plus defenseman Ian Mitchell, all of whom were in the lineup on Saturday. They may have to get another forward to Minnesota for Sunday’s game as well. The only extra forward is Justin Brazeau and, as a possible trade chip, management may not want to risk playing him less than a week form the deadline. They could also use extra defenseman Jordan Oesterle up front.

We’ll see.

On Saturday, the Bruins took a 2-0 lead in the first period but suffered yet another deleterious development fot their long-term prospects.

Pastrnak – who else? – put the B’s up just 1:32 into the game on a pretty play. Morgan Geekie pounced on a puck up high in the Boston zone and sent a cross-ice diagonal pass to Pavel Zacha in the neutral zone. With Pastrnak streaking down the right wing, Zacha hit him with a great backhand pass for a clean break-in. Pastrnak went forehand-backhand-forehand to beat goalie Alex Nedeljkovoc, badly, for his 32nd goal of the season and extend his point streak to 17 games.

But in the midst of a dominant Bruin power play, the B’s lost the captain. As Marchand was going after a puck in the corner, P.O Joseph tripped him and then followed it up with a hit from behind, driving Marchand’s head into the boards.

Marchand, who had suffered a concussion in the playoffs last season, stayed down on the ice for an extended period of time. Eventually, he skated off and went to the room with a lot of help. The Bruins termed it an upper-body injury.

On the same power play, Mason Lohrei made it 2-0 at 6:33 with a post-and-in wrister, his fourth goal of the season.

As play resumed, Mark Kastelic missed his first hit attempt on Joseph, but connected well on his second, knocking the defenseman out of the game. Joseph skated off favoring his right shoulder after the clean hit.

Meanwhile, Joonas Korpisalo, playing his first game since February 5, ad to make a couple of good saves early as well as on a Pittsburgh 5-on-3.

In the second period, the B’s had an opportunity to go by three on a penalty kill after a bad John Beecher offensive zone stick penalty. On the kill, Cole Koepke created a breakaway for himself but Nedeljkovic came up with the stop.

The Pens had one good chance in the scoreless second period when, off a great Sidney Crosby touch pass, Bryan Rust set up Rickard Rackell but he missed a good chunk of open net.

The B’s also had a late 2-on-1 in the second but Merkulov’s return pass to Elias Lindholm was blocked.

Then Pastrnak, at 3:38 of the third, Pastrnak was awarded a penalty shot when Erik Karlsson tripped him from behind. But on the free look, Nedeljkovic blockered away Pastrnak’s backhander.

After Koepke hit the post on a partial break, the B’s were forced to kill off their fifth penalty when Kastelic threw down Vincent Desharnais after whistle, and they were able to kill it.

Then the B’s gave the Pens’ life with 5:59 left in regulation with a shorthanded goal. Parker Wotherspoon could not keep the puck in at the blue line and Kevin Hayes took off. Both Wotherspoon and Mitchell cut off Hayes but he curled up and fed Anthony Beauvillier for what was the ninth shorty given up by the B’s this year.

Then with 1:34 left in regulation, Koepke was called for high-sticking double minor on Rakell. But after a Brandon Carlo block of a pass, Nikita Zadorov fed Charlie Coyle for an empty net.

It wasn’t over.

With 21.4 seconds left, Rackell scored to make it 3-2 with PP time still left. But that’s as close as the Pens would get