Washington defenceman Nate Schmidt added a goal in the third for the Capitals, who beat Nashville at home on Saturday. Schmidt, a 22-year-old rookie, scored his first NHL goal in that game.
Grabovski's goal came on a penalty shot.
In his fourth NHL game, Philipp Grubauer made 30 saves for Washington (16-12-2) to earn his first career win. The Capitals have won four of five.
New York (15-15-1), beaten at home in overtime by New Jersey on Saturday, has lost three of five. Henrik Lundqvist made 32 saves, and Benoit Pouliot scored the Rangers' lone goal with 1:53 left to spoil Grubauer's shutout bid.
BLACKHAWKS 6, PANTHERS 2
CHICAGO (AP) — Patrick Sharp had a goal and two assists, and Chicago scored a season-high three times on the power play in a win over Florida.
The Blackhawks used their potent offence to win after starting goalie Corey Crawford left in the first period because of a lower-body injury.
Marian Hossa, Brent Seabrook and Brandon Saad each had goal and an assist, and Michal Handzus and Andrew Shaw also scored. Patrick Kane had three assists for Chicago, which ended a three-game losing streak — its longest regular-season skid since February 2012.
Rookie Antti Raanta, recalled after veteran backup Nikolai Khabublin was injured on Nov. 16, stopped 29 of 31 shots for the win in relief of Crawford, who made four saves.
WILD 3, SHARKS 1
ST. PAUL, Minn. (AP) — Josh Harding made 37 saves in another strong home outing, and Minnesota beat San Jose despite recording only 13 shots.
Patrick Marleau scored with 1:41 left for San Jose, which went 1-3 on a four-game trip. The Sharks, who have lost three in a row in regulation for the first time this season, are 0-5-1 in their last six games in Minnesota.
Antti Niemi made 10 saves.
Parise and Koivu scored second-period goals to give Minnesota a 2-0 lead. Parise pushed the Wild's edge back to two goals when he scored at 19:54.
Harding, who improved to 13-1 at home, is 16-4-3 overall.
BRUINS 5, MAPLE LEAFS 2
The Bruins were coming off a Saturday night win over Pittsburgh in which Shawn Thornton had a takedown of Brooks Orpik. The Bruins were without the suspended Thornton as well as Loui Eriksson and Chris Kelly, who were both injured in the game.
The Leafs controlled the play early on and led 1-0 after the first on a goal by Peter Holland.
But the Bruins had a three-goal outburst in the second period, including a pair of power-play goals in a 93-second stretch.
Toronto, which also gave up two power-play goals in a win against the Senators on Saturday, went 0 for 4 on the power play Sunday.
The Bruins outshot the Leafs 40-32.
Jay McClement also scored for Toronto.
CANUCKS 3, AVALANCHE 1
VANCOUVER, British Columbia (AP) — Mike Santorelli scored two goals and added an assist in Vancouver's victory over Colorado.
The Canucks (17-10-5) earned their fifth win in sixth games and moved within a point of the Avalanche (20-8) in the tight Western Conference standings.
Jean-Sebastien Giguere lost for the first time in eight decisions this season. The Avalanche were beaten for just the third time in nine games.
Ryan Kesler also scored for the Canucks, who were outshot 29-21.