Alex Ovechkin scored his 27th goal of the season for the Capitals (36-30-10), who have scored six goals while losing four straight (0-3-1). Charlie Lindgren made 20 saves.
“I think we try to create the extra pass,” said Ovechkin, the Washington captain. “We’re holding the puck a little bit longer, trying to find the pretty play. It’s not going to work, especially at a moment in the season when everybody is concentrating on a win, everybody is playing a little faster. You have to make a decision quicker.”
The Capitals fell behind the Islanders for the second wild card and trail New York by one point. Washington plays the second of a back-to-back Friday at the Carolina Hurricanes.
"We have enough veterans in here where we know we can't dwell on tonight,” Capitals forward Max Pacioretty said. “If you let two points slip tomorrow because of your frustration with tonight, then that's a rookie mindset.”
Ryan Shea gave the Penguins a 1-0 lead at 1:49 of the first period, scoring from the left point on a wrist shot through a screen for his first NHL goal.