Vrana made it 2-0 on a one-timer from the right circle off a cross-ice pass from John Carlson at 7:42 of the second period.
Sprong entered the zone 2-on-1 with Alex Ovechkin, opted to keep the puck and beat Wedgewood with a wrist shot to give the Capitals a 3-0 lead at 10:36, and then appeared to say something to Ovechkin during the celebration.
"I looked him off in the morning skate and he wasn't too happy," Sprong said. "Two-on-1, the [defenseman] played [Ovechkin], and their goalie decided to take away his side too, so I just had to hit the middle of the net, and that's what happened. When you go down on a 2-on-1 with the greatest goal-scorer, I think everyone thinks that you're going to give it to him, and even the goalie thought so."
Kuokkanen pulled the Devils within 3-1 when he scored off a pass from Zajac at 12:44. Orlov scored on a wrist shot from high in the right circle to make it 4-1 at 15:03.
"We weren't giving up breakaways, we weren't giving up 2-on-1s," Ruff said of the second period. "But we made some poor puck decisions which cost us and that was probably the difference."
NOTES: Vrana has scored five goals in his past six games. ... The Devils power play was 0-for-3 and is 0-for-18 in the past six games. ... The Capitals have won the four games against the Devils this season. ... Carlson has 499 NHL points (110 goals, 389 assists) and is four assists from passing Mike Gartner for fourth in Washington history. ... Orlov has scored in two straight games after scoring once in 18 games.