During the final seven minutes of the third period in the Blues' 4-3 win in Game 3 on Monday, the Stars scored tying goals twice. Each time the Blues responded, capped by Pat Maroon's game-winning goal with 1:38 remaining.
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The Blues feel their unflappable mentality is one reason why they lead the best-of-7 series 2-1 and are two victories from reaching the Western Conference Final for the second time in four seasons.
St. Louis is 4-0 on the road to begin the playoffs for the second time, and first time since 1969.
"They're not always going to go your way and you've just got to keep fighting and stay with it," Blues coach Craig Berube said. "Frustration's not a good thing. It's important to stay composed, stay working and keep working."
The Blues were tested Monday, but Berube said the core group of veteran players kept the message simple and clear and the group remained poised.
"We've got good veterans to keep everything calm," Berube said. "[Alexander] Steen does a great job with that, [Alex] Pietrangelo, [Jay] Bouwmeester, all the veteran guys, [Ryan] O'Reilly, [Vladimir] Tarasenko. We've got a lot of veterans.
"We've got to stay calm and composed. We talk about discipline and composure all the time during games. I thought we did a good job of it."
When Stars forward Andrew Cogliano tied the game 2-2 with a shorthanded goal at 13:06 of the third, that seemed to hand the momentum to Dallas. But Pietrangelo had an answer 1:18 later to give the Blues a 3-2 lead. When Tyler Seguin tied it 3-3 at 15:52 following a Blues turnover, Maroon answered 2:30 later to put the Blues ahead 4-3.