The Bruins could have secured finishing with the fourth worst record in the NHL with a regulation loss in Pittsburgh on Sunday. David Pastrnak, however, has shown no desire to help the B’s drafting position.

The B’s superstar picked up two more assists for his fifth straight multiple-point game, Fabian Lysell scored his first NHL goal and the B’s beat a disinterested Penguins team, 4-1.

Pastrnak now has a nine-game point streak, with 8-12-20 totals in that span.

The Bruins dominated the first period, outshooting the Pens, 13-6, but it looked like they’d be victimized by an excellent period by Pittsburgh goalie Tristan Jarry.

A terrific power play produced several good scoring chances, but Jarry robbed Morgan Geekie on a one-timer. Jarry was also the beneficiary of a Geekie one-timer that missed a wide-open net.

But after a late-period gloved punch-up between Parker Wotherspoon and Evgeni Malkin produced a 4-on-4, the B’s cashed in on the open ice with three seconds left.

Pastrnak had a strong, aggressive shift, creating one turnover down low, and then assisting on Elias Lindhom’s 17th goal of the season. From above the left circle, Pastrnak made a nice diagonal pass down to Lindholm at the right side of the net. Jarry stopped Lindholm’s initial redirection of the puck, but Lindholm stayed at the top of the crease and put home his rebound.

That helper was Pastrnak’s 103rd point and extended his point streak to nine games.

The B’s stretched their lead to 3-0 in the second period, with one goal coming from a welcome source.

While Pastrnak was all over the place in the first period, Lysell had been using his speed to create chances as well. And he was later rewarded with this first NHL goal on a power play at 8:52. After Ville Koivunen was whistled for a questionable trip on Mason Lohrei, Marat Khusnutdinov pushed the puck deep to Pavel Zacha, who found the wide-open Lysell in front of the net.

Jarry was in position to make the save but Lysell’s shot broke through the netminder and found the back of the net. The secondary helper snapped a five-game pointless streak for Khusnutdinov.

Then Pastrnak gave Geekie another shot at a one-timer and, this time, his new wingman didn’t miss. Off the rush on the right wing, Pastrnak fed Geekie for the one-timer and Geekie buried his 32nd goal of the season. At first it looked like it was Pastrnak’s after it hit the back bar and quickly bounced to Pastrnak, who banked the rebound off Jarry and in, but a closer look showed that Geekie’s original shot was in. Nonetheless, the assist gave Pastrnak his fifth straight multiple-point game.

The B’s appeared to be in complete control of the game when Nikita Zadorov picked up a pair of minors, tying him Ottawa’s Brady Tkachuk at the top of the league with his 38th and 39th infraction. First, he came in after the whistle in front of his net and gave Connor Dewar a late shove, earning a roughing penalty. Then, after barking at one of the officials on his way to the box, he got hit with the extra two with 1:58 left in the period.

With 16 seconds remaining in the second, Philip Tomasino banked a shot of Rickard Rackell’s leg to beat Joonas Korpisalo and get Pittsburgh on the board while starting the third still on the PP.

The B’s, however, were able to kill off the second Zadorov minor and the B’s hung on. With 2:30 left, Jakub Lauko outworked Malkin for a loose puck to score an empty-netter to seal it.