The Bruins got 28 saves from Rask, who was hoping to contribute to an NHL title after serving as Tim Thomas' backup when Boston won it all two years ago.
"It's obviously shocking when you think you have everything under control," Rask said quietly, standing at his locker with a blue baseball cap on backward and a towel draped over his shoulders.
The sold-out TD Garden was chanting "We want the Cup!" after Milan Lucic's goal put the Bruins up 2-1 with eight minutes left, but it fell silent when Boston coughed up the lead. The team came out to salute its fans as they streamed out of the building for the last time, from the air conditioning into the summer air.
"Probably toughest for sure, when you know you're a little bit over a minute left and you feel that you've got a chance to get to a Game 7," Bruins coach Claude Julien said. "And then those two goals go in quickly."
The arena was almost empty — except for a few hundred fans in red Blackhawks sweaters who filtered down to the front rows — when NHL commissioner Gary Bettman handed the 35-pound Cup to Toews, who left Game 5 with an undisclosed injury and wasn't confirmed for the lineup until the morning skate.
The Chicago captain skated with the Cup right over the crease in which the Blackhawks mounted the comeback and in front of the fans in Blackhawks sweaters who lined up along the front row behind the net. Toews banged on the glass while the remaining Bruins fans headed up the runways.
He then continued the tradition of handing it from player to player before the team settled to the side of the faceoff circle for a picture with the trophy they will possess for the next 12 months.