P.A. Parenteau scored the game-winner with game slide with a 3 victory over the Capitals.
Parenteau and Frans Nielsen each had a goal and two assists for New York, which tied a season-high in goals.
With time winding down, Vokoun allowed Milan Jurcina's slap shot from the point to slip under his pads, and Parenteau was there to stuff in the difference maker while falling to the ice.
John Tavares sealed things with an empty-netter with 61 seconds on the clock.
The Caps, playing their first back-to-back of the season, jumped out to a 2-0 lead on first-period goals by Ward and Ovechkin, the latter's coming on a one- timer from between the circles with 1:19 showing.
Nielsen backhanded in his own rebound 1:41 into the second frame and assisted on Brian Rolston's tying goal with 3:05 remaining in the period.
Washington's Matt Martin and Laich traded goals in the first 9:12 of the final period.
New York had scored more than two goals in a game just twice in its first 10 contests...Capitals defenseman Mike Green (ankle) missed his fifth straight game...Washington swept last season's four-game series against New York.