Even after sweeping a four-game homestand to start the season, Colorado Avalanche players felt they could do a better job of starting games.

They proved themselves right Monday against the Washington Capitals.

Nazem Kadri and Mikko Rantanen each had a goal and two assists, and Colorado scored four first-period goals to beat host Washington 6-3 and improve to 5-0. The Avalanche scored on its first three shots on goal and four of the first five.

"That was one of the weirdest starts, or the craziest ones that I've seen in a long time," said Avalanche goalie Philipp Grubauer, who stopped 29 shots against his former team. "But obviously we talked about that. Because we didn't come out too hot in the last four games. So we wanted to make sure we come out really strong."

The Avalanche's season-opening win streak is tied for its second-longest since the team moved to Colorado and matches its fourth-longest in franchise history.

"I don't think we've played our best yet," Grubauer said. "I think we dodged a couple bullets a little bit early and got the win, but overall we got the two points. Nobody is asking at the end how."

Boston 4, Anaheim 2: David Pastrnak scored a career-high four goals, Jaroslav Halak stopped 30 shots and Brad Marchand added two assists for the host Bruins. Rickard Rakell and Adam Henrique scored for the Ducks.

Chicago 3, Edmonton 1: Patrick Kane and Alexander Nylander scored, Corey Crawford stopped 27 shots and the host Blackhawks won for the first time this season. Crawford lost a bid for his 26th career shutout when James Neal scored his NHL-leading eighth goal on a power-play with 2:11 remaining.

Florida 6, New Jersey 4: Mackenzie Weegar scored the tying goal 30 seconds into the third period and set up Noel Acciari for the go-ahead tally for the visiting Panthers, who rallied from a three-goal deficit and ended a three-game losing streak. The Devils fell to 0-4-2.

N.Y. Islanders 3, St. Louis 2 (OT): Devon Toews scored the winner at 1:13 of overtime for the host Islanders, who pulled even on goals from Brock Nelson and Matthew Barzal in the final 5:31 of regulation. Goals from Brayden Schenn and Vladimir Tarasenko had given the Blues at 2-0 lead.

Buffalo 4, Dallas 0: Rookie forward Victor Olofsson set an NHL record by becoming the first player to score his first seven career goals on the power play, helping the Sabres win in Buffalo, N.Y. Buffalo (5-0-1) has earned a point in its first six games for the first time since the team went 6-0-2 to start the 2008-09 season. The Stars' Ben Bishop stopped 18 shots. He entered the game with a 12-0-1 record and consecutive shutouts vs. the Sabres.