Late in the second period, one Boston had come into the game vowing to take control of, a Nash pass in the direction of Marchand went for an icing with the score tied 1-1. The line had been on for a lengthy shift, one that would end for Marchand and Pastrnak at 1:15 of ice time each.
But before they could get to the bench, there was the matter of the defensive zone face-off.
"Not tired at all," Nash said. "Had my legs right underneath me.
"No, that was one that you just try and battle out. You definitely don't expect the outcome that we got out of that."
Nash lost the face-off to Auston Matthews, but Zach Hyman couldn't keep possession of the puck and it bounced to Bruins defenseman Adam McQuaid. McQuaid cleared it off the boards, past Maple Leafs defenseman Jake Gardiner, and Pastrnak collected the puck in the neutral zone.
With Marchand joining the rush, Pastrnak skated in on a 2-on-1 and sent a no-look pass to Marchand, who scored into an open net to give the Bruins a 2-1 lead at 16:55 of the second period.
It felt like a backbreaking moment, with the Maple Leafs only able only to look on as the Bruins celebrated, their exhaustion melted into elation.
"I was going to play the puck, but I saw [Gardiner] coming and miss, so I moved last second, and he let me go through," said Pastrnak, who had two assists. "So we got a chance to go 2-on-1. We always find the energy for that, somehow.
"I was just pretty tired. I tried to get it to Marchy's hands. It got through."
Torey Krug had gotten the Bruins on the board 28 seconds into the game to make it 1-0 with a shot from the top of the left circle. Jake DeBrusk scored on another 2-on-1 with David Krejci at 4:17 of the third period to extend the lead to 3-1.