The Capitals won their eighth consecutive Super Bowl matinee and snapped the five-game winning streak of their dreaded rival Penguins, who are dealing with a likely season-ending knee injury to Evgeni Malkin and are awaiting Sidney Crosby's return from a concussion.
Pittsburgh's hopes for a Super Sunday double -- the Steelers were playing for the NFL title later in the day -- were stifled by an improved Washington defense anchored by Michal Neuvirth, who made 22 saves in his first start since Jan. 18.
Mike Knuble added an empty net goal for the Capitals.
DEVILS 4, CANADIENS 1
In Montreal, Dainius Zubrus and Ilya Kovalchuk scored 2:52 apart early in the first period, sending New Jersey past the Canadiens.
Martin Brodeur got his 615th career win despite leaving after the first period because of a bruised right leg. Brodeur stopped all 11 shots he faced before he was replaced by Johan Hedberg, who made 14 saves over the final two periods.
LIGHTNING 4, BLUES 3 (OT)
In Tampa, Fla., Vincent Lecavalier had a power-play goal at 4:53 in overtime, Steven Stamkos scored his NHL-leading 40th goal and the Lightning topped St. Louis.
Lecavalier converted a rebound backhander for his ninth goal of the season.
Stamkos had three assists, and Dominic Moore and Steve Downie also scored for the Lightning, who have won seven of eight. Stamkos also leads the NHL with 72 points.
Patrik Berglund, David Backes and Nikita Nikitin had the St. Louis goals. The Blues have lost 11 of 14.