Alex Tuch scored 4 minutes, 44 seconds into overtime, Jonathan Marchessault had two goals and the Vegas Golden Knights beat the Colorado Avalanche 4-3 on Saturday to earn the No. 1 seed in the Western Conference in Edmonton, Alberta.

The Golden Knights will face Chicago, seeded 12th, in the first round of the playoffs; the second-seeded Avs will take on Arizona.

"We came here to take care of every challenge ahead of us. We did a good job," Marchessault said. "We wanted the first seed after the round robin and we got it done. So I think it's pretty positive.."

Tuch, a former Wild player, scored the winner on a shot over the shoulder of Avalanche goaltender Philipp Grubauer. It was Tuch's third goal in round-robin play.

Marchessault scored in the second period and again early in the third when he was pulled down by Avalanche defenseman Ryan Graves on a breakaway. Awarded a penalty shot, Marchessault beat Grubauer to the glove side.

Eastern Conference

Philadelphia 4, Tampa Bay 1: Rookie Nicholas Aube-Kubel scored two goals in the first period and Carter Hart made 23 saves as the Flyers beat the Lightning in the Eastern Conference round-robin to earn the top seed in the Eastern Conference. Joel Farabee and Tyler Pitlick had the other goals for Philadelphia.

Summaries, standings, C11.