Ovechkin, who had been limited to two shots, skated down the right wing, got a half-stride on defenseman Chris Phillips and sent a wrist shot from the right circle past goalie Pascal Leclaire for his third goal of the season.
Alexander Semin and Eric Fehr scored for the Capitals, who have won two straight games.
Jarkko Ruutu and Ryan Shannon scored for Ottawa, which is winless in three games this season.
In Philadelphia, Jeff Carter scored his second goal of the game with 2:38 left in the third period to lift Philadelphia over Colorado.
Carter snapped a tie when his shot bounced through the legs of goalie Craig Anderson . Darroll Powe added an empty-netter only moments later for some insurance on the night the Flyers raised their Eastern Conference champions banner.
Claude Giroux scored a short-handed goal for the Flyers. Rookie goalie Sergei Bobrovsky had another solid game for the Flyers.
Brandon Yip and Milan Hejduk scored for the Avalanche to help them rally from a 2-0 hole and tie the game.
In Buffalo, New York, Marian Hossa scored twice, Nick Leddy got his first career NHL goal, and Corey Crawford shrugged off a shaky start to win his second NHL game in goal in Chicago’s victory Buffalo.
The game was marred by a scary moment in the first period when Sabres right wing Jason Pominville was carted off on a stretcher after being hit into the boards from behind by Chicago defenseman Niklas Hjalmarsson with 5:42 to go.
Pominville sustained a concussion on the play, while Hjalmarsson was given a 5-minute major for boarding and a game misconduct. The Sabres were unable to capitalize on the man advantage.
Patrick Kane also scored for the defending Stanley Cup champion Blackhawks, who won their first game of the season after two straight defeats.
In Newark, New Jersey, Alex Goligoski and Mark Letestu scored goals within a three-minute span covering the first and second periods to lead Pittsburgh over New Jersey.
The Devils fell to 0-2-1, their worst start since the 2001-02 season.
Patrik Elias scored a third-period goal to cut the Penguins’ lead in half, but Brent Johnson made nine saves over the final nine minutes to secure the victory. Johnson made 30 saves in all to earn the win.
Martin Brodeur made 28 for the Devils.
Former Devils defenseman Paul Martin , who signed with Pittsburgh over the summer, scored on an empty net with 10.9 seconds left. Martin also had an assist earlier in the game.
In Uniondale, New York, Blake Comeau and P.A. Parenteau scored power-play goals 58 seconds apart late in the third period, rallying the Islanders over the Rangers.
Parenteau, a former Rangers forward, tied it with 4:24 remaining and Comeau put the Islanders in front for good with his second of the day and third in two games. Nine of Comeau’s 35 NHL goals have been scored against the Rangers in 14 games.
Frans Nielsen added an empty-net goal with 18.2 seconds left to seal the victory for Rick DiPietro , who stopped Marian Gaborik’s penalty shot and made 29 saves.
Josh Bailey and Matt Moulson also had goals for the Islanders.
Artem Anisimov gave the Rangers a 4-3 lead with 7:14 left, but they couldn’t hold on for their second road win.
In Vancouver, British Columbia, Daniel Sedin scored his second goal of the game with 5:08 left and Vancouver beat Florida.
Twin brother Henrik Sedin and linemate Mikael Samuelsson each had two assists, and Roberto Luongo made 41 saves as the Canucks bounced back from a shootout loss to Los Angeles in their first game on Saturday.
After opening the scoring on a short rebound in the first period, Daniel put the Canucks ahead again on a late scramble. Tomas Vokoun made an amazing headfirst dive save at one side of the net, but the puck squirted out the other side and this time it was Daniel lunging forward to knock it over the goal line.
In St. Louis, David Backes and Andy McDonald broke a 42-year-old franchise record by scoring 6 seconds apart early in the first period, and St. Louis went on to a victory over Anaheim.
Backes scored at 3:53 when he sneaked down the left side after an Anaheim turnover and fired in David Perron’s centering pass. T.J. Oshie won the ensuing faceoff at center ice, got the puck back from Patrik Berglund in the high slot and fed it to McDonald near the left circle. McDonald beat Ducks goalie Jonas Hiller with a wrist shot at 3:59 to make it 2-0.
The two goals in a 6-second span broke the previous club record of 7 seconds apart set by Don McKenney and Frank St. Marseille on Jan. 24, 1968, against the Minnesota North Stars.
