Jonathan Marchessault scored 49 seconds into overtime and the Vegas Golden Knights beat the St. Louis Blues 2-1 Monday night for their third straight win.

Pavel Dorofeyev also scored and Logan Thompson stopped 30 shots to help Vegas win for the sixth time in its last eight games. The Golden Knights moved five points ahead of the Blues for the final Western Conference wild card.

Brandon Saad scored and Jordan Binnington finished with 32 saves for St. Louis, which had won two straight games and five of its last seven.

The Blues' Pavel Buchnevich was awarded a penalty shot 30 seconds into overtime after Noah Hanifin tripped him on breakaway. Thompson denied him with a glove save to keep the score deadlocked at 1-1.

Just 19 seconds later, Marchessault picked up a loose puck behind the Blues' net while William Karlsson fended off two players along the end boards, brought it out on the left side and settled it before firing his 39th goal of the season past Binnington.

The Blues host Calgary on Thursday night.