Boston lost in regulation when leading by at least three goals for the second time in their past 208 regular-season games. It was 200-1-6 since 2010-11, losing in regulation 5-3 to the New York Rangers on April 4, 2011.
"We all have to take responsibility and be accountable for how we're able to play in this locker room," Bruins forward Patrice Bergeron said. "I've said that many, many times. I think it's one of those games where we're playing a good team, they're going to give you a push, but then you can't let that go by. It's a 3-0 lead and there's a lot of game left, so you have to play the right way and keep pushing to keep increasing that lead."
After the Bruins scored on two of their first three shots and Pastrnak made it 3-0 with his NHL-leading 37th goal, Dominik Simon cut it to 3-1 at 16:34 of the first on a sharp-angled shot, set up by a pass from behind the net from Crosby.
Teddy Blueger made it 3-2 on another goal set up by Crosby 33 seconds into the second period. Crosby sent a backhand pass between his legs to Blueger in the slot for a wrist shot.
Jack Johnson tied it 3-3 when he scored shorthanded with a slap shot at 1:41 of the third period.