Playing outdoors in optimal conditions at Fenway Park on Monday, the Penguins lost their fifth straight game,
2-1 to the Boston Bruins
.
Pittsburgh has lost by one goal three times during the skid (0-3-2).
"There's a fine line between winning and losing," Penguins coach Mike Sullivan said.
Pittsburgh was unable to protect a one-goal lead in the third period, when Boston forward Jake DeBrusk scored twice, including the go-ahead goal with 2:24 remaining.
"It comes down to subtle details, some timely plays," Sullivan said. "That was the way the game went."
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The Penguins (19-12-6) received a lift from two unlikely sources; goalie Casey DeSmith stopped the first 15 shots he faced after coming off the bench at 15:30 of the first period, when starter Tristan Jarry sustained a lower-body injury, and forward Kasperi Kapanen made it 1-0 with his first goal in 12 games at 8:40 of the second period.
But Pittsburgh couldn't find another goal, and forward Evgeni Malkin scored just after the final horn sounded, adding to the frustration.
"We get a couple of chances, and we don't extend our lead," Penguins captain Sidney Crosby said. "They hang around and get a goal. Then, it's next goal wins from there, and they got it. Ideally, we would have found a way to extend our lead."
DeSmith, a New England native (Rochester, New Hampshire), allowed a wraparound goal by DeBrusk at 7:46 of the third, shortly after Pittsburgh killed a penalty. DeBrusk scored the decisive goal on a rebound at 17:36 after Bruins forward Taylor Hall's backhand was denied by DeSmith's left pad.
"He played unbelievable," forward Jake Guentzel said of DeSmith. "It's a tough situation to come into like that, but he played an amazing game. Gave us a chance to win. Disappointed we couldn't get it done for him."