LAS VEGAS -- Chandler Stephenson scored with 1:59 remaining in overtime, and the Vegas Golden Knights rallied from three goals down in the first period to defeat the St. Louis Blues 5-4 at T-Mobile Arena on Saturday.
Stephenson, who also had an assist, won it on a breakaway when he beat Jake Allen five-hole.
"Just kept my momentum from the backcheck and wheeled around the net," Stephenson said. "[Golden Knights defenseman Nate Schmidt] made a good play to kind of keep the puck there, just poked it. Kind of blacked out a little bit from there and just tried to stick with what I usually go with."
[WATCH: All Blues vs. Golden Knights highlights]
Marc-Andre Fleury made 27 saves for the Golden Knights (24-15-6), who have won four straight and are 8-2-1 in their past 11 games. It was Vegas' first three-goal comeback in its history.
"It wasn't too much of a statement the first 28 minutes, but after that, we played good hockey," Golden Knights coach Gerard Gallant said. "We battled back. You never say never in this League."
David Perron had a goal and two assists, and Ryan O'Reilly had three assists for the Blues (26-10-7), who are 0-2-1 following an eight-game winning streak. Allen made 28 saves.
Video: STL@VGK: Perron nets PPG on sizzling slap shot
"We made mistakes. They're a pressure team and they put on the pressure," Perron said. "We got a big point, but it would have been nice to get the second one."
Alex Pietrangelo scored a power-play goal from the high slot to give St. Louis a 1-0 lead at 7:05 of the first, and Jaden Schwartz scored glove side on a 2-on-1 to make it 2-0 at 12:41.
Oskar Sundqvist extended the lead to 3-0 at 16:16.
Video: STL@VGK: Sundqvist knocks home bouncing puck in front
"It could've been 5-0," Stephenson said. "It just shows what kind of veteran [Fleury] is. He kept us in it and gave us a chance to come back."
Ryan Reaves scored on a rebound in front to make it 3-1 at 13:10 of the second period before Paul Stastny received a cross-crease pass from William Carrier and scored on a tap in to cut it to 3-2 at 15:32.
Nicolas Roy tied it 3-3 at 3:02 of the third period, finding the rebound in a scramble at the top of the crease following a shot by Nicolas Hague.
Video: STL@VGK: Roy nets tying goal early in 3rd
"We sat back too much and it killed us," O'Reilly said. "They came at us in waves."
Reilly Smith gave Vegas a 4-3 lead at 9:50 after collecting a loose puck in the high slot, but Perron tied it 4-4 on the power play at 12:50.
Golden Knights rookie forward Cody Glass left at 6:49 of the third period with a lower-body injury and had to be helped to the locker room. There was no update after the game.
Video: Stephenson lifts Vegas in overtime
They said it
"We got a 3-0 lead, we had a chance to make it 4-0. We had some good opportunities early in the second period. We don't make it 4-0, and if we do, we probably have two points. But in saying that, we've got to do a better job around our net." -- Blues coach Craig Berube
"It's great, this win. We had to score those goals. I thought our forwards did a good job working the pucks down low. Those goals we scored to kind of claw back in it, they weren't pretty goals. Just put the puck on net, win the puck battle and just put it in." -- Golden Knights defenseman Nicolas Hague
Need to know
St. Louis has allowed 15 goals in its past three games after allowing 16 in its previous eight. … Schwartz has 13 points (five goals, eight assists) in his past nine games. … Pietrangelo has 11 points (five goals, six assists) in his past seven games. … Fleury's win was his 457th in the NHL, one shy of tying New York Rangers goalie Henrik Lundqvist for fifth place in League history. … Golden Knights forward Max Pacioretty had his five-game point streak end. … Stephenson's goal was his fifth with Vegas since being acquired in a trade with the Washington Capitals on Dec. 2. … Vegas is 4-0-0 on its season-long seven-game homestand. … Perron, who played for the Golden Knights in their inaugural season in 2017-18, has now scored against each team in the NHL.
Blues: Host the San Jose Sharks on Tuesday (8 p.m. ET; FS-MW, NBCSCA, NHL.TV)
Golden Knights: Host the Pittsburgh Penguins on Tuesday (10 p.m. ET; ESPN+, SN, SN1, ATTSN-RM, ATTSN-PT, NHL.TV)
Video: Stephenson, Golden Knights prevail in OT thriller