The Oilers blew a two-goal lead in the third period by giving up five unanswered goals to the Stars, and following the game, Leon Draisaitl appeared to be fuming.
The Edmonton Oilers dominated Game 1 of the Western Conference Final until the third period unraveled.
Up 3-1 over the Dallas Stars after two good periods Wednesday, Edmonton surrendered three straight power-play goals in under six minutes and lost 6-3.
It was a disconcerting flip-flop for the Oilers, who dominated third periods this post-season. Their penalty killing broke down, as goals were scored by Miro Heiskanen, Mikael Granlund, and Matt Duchene, all off Oilers' penalties.
Leon Draisaitl assisted on all three Edmonton goals, and Connor McDavid had two assists and was a persistent threat in the early going.
Ryan Nugent-Hopkins snapped an Edmonton power-play dry spell with the team's first road goal in 16 attempts, and Evan Bouchard scored to make it 3-1 shortly thereafter.
But Dallas, which was blanked on the power play in last year's playoff contest versus Edmonton, turned the tables. With traffic in front of the net, they scored through the Oilers' penalty kill three times, turning the game on its head.
Although having a mid-game power-play chance and good pressure with a delayed penalty, the Oilers could not tie. Edmonton went 1-for-3 on the power play, but Dallas was 3-for-4.
Tyler Seguin scored an insurance goal late, and Esa Lindell scored into an empty net.
Following the game, Draisaitl appeared to be putting his team on blast, calling their effort immature and saying they need to be more mature going forward.
'We give up three goals in a row on the kill. It just kills the momentum, and then you're chasing the game,' said Oilers forward Leon Draisaitl, who had a goal and two assists.'The game changes from there. We've got to be an awful lot more mature than that.'
The Oilers were on a four-game road-winning streak entering the night but were unable to reach five.
Special teams remain a problem on the road in particular, as they've surrendered 12 road power-play goals and struggled mightily to score with an advantage.
Game 2 is Friday in Dallas before the series shifts to Edmonton on Sunday. The Oilers will attempt to bounce back from letting a winnable opener slip through their fingers.
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