Matt Poitras exited early in the third period with an upper-body injury, and Linus Ullmark had to be helped off in overtime in Boston’s 4-3 overtime loss to the Arizona Coyotes on Tuesday.

The Boston Bruins went to overtime for the second day in a row on Tuesday, this time against the Arizona Coyotes, where they fell 4-3.

Nick Schmaltz ended it with 56 seconds left in overtime, skating in and beating Jeremy Swayman far side off the post.

Morgan Geekie had two assists, and Jesper Boqvist scored his first goal with Boston, which dropped to 24-8-8. Linus Ullmark made 32 saves in 62:06 before he had to be helped off the ice with a lower-body injury after a save attempt on Logan Cooley. Swayman allowed the winning goal on the only shot he faced in 1:24. David Pastrnak and Jake DeBrusk scored the other two Bruins goals.

Pastrnak had two breakaway chances in overtime. The first came just 16 seconds in after the puck bounced over Matt Dumba’s stick at the point, but Arizona goalie Connor Ingram made the save. The other rang off the post at 3:26.

Mattias Maccelli put the Coyotes ahead 3-2 just 52 seconds into the third period, following up Lawson Crouse’s breakaway after Mason Lohrei fumbled the puck away at Arizona’s blue line. Matt Poitras exited the game shortly after Maccelli’s goal with an upper-body injury.

DeBrusk tied it 3-3 at 5:04 of the third on the power play after Hampus Lindholm found him alone in the right circle, where he fired a wrister short side.

Pastrnak opened the scoring at 4:41 of the first period with a snipe from the left face-off circle on the power-play. It was his 25th goal of the year.

Arizona forward Clayton Keller tied it 1-1 at 8:12 of the second period, skating in on net and finishing his own rebound, but Boqvist put Boston back ahead 2-1 just 50 seconds later. Breaking the puck out down the right side, Boqvist cut into the high slot and uncorked a wrister that went bar down.

Dylan Guenther tied it 2-2 at 16:29 of the second, with Arizona taking advantage of a Bruins line change to skate into the zone, where Cooley centered it to Guenther in the slot.

The Bruins have lost three of their past four, and face two more Western Conference opponents over the next four days.