New York, NY – Brandon Prust's short-handed goal early in the leading 2.
Fresh off a hat trick against the Flyers on Saturday, Ryan Callahan added a goal for the Rangers, who have won three in a row and seven of nine overall. Ryan McDonagh also lit the lamp on Sunday.
Henrik Lundqvist made 10 of his 24 saves in the third period for the victors.
John Carlson had a goal and an assist for the Capitals, who have lost two straight and seven of 10.
Alexander Semin also scored and Michal Neuvirth turned aside 25-of-28 shots.