Binnington's confidence seemed to be building from early on Wednesday.
He handled the puck with composure all night, and the only goal he allowed was a perfect shot through a screen by Jets forward Patrik Laine that went just under the crossbar to make it 1-0 at 13:28 of the first period.
Despite the goal, that confidence was on display late in the game.
With the Blues leading 2-1, Binnington made a save with his right pad on a one-timer from Scheifele in the left circle with 12.4 seconds remaining in regulation.
"He was calm," Bouwmeester said. "I think that helps. I think with goalies, it's confidence and just relying on their routines and ... I don't know, they do some weird stuff. But they're creatures of habit and nothing bothers him. He's confident and everyone lets him go about his business and he's a great guy, so everyone wants to play hard for him."
Tyler Bozak, who scored the tiebreaking goal for the Blues with 2:05 remaining in the third period, said Binnington's performance in Game 1 was unreal.
"He's been a rock for us back there," Bozak said. "He gives us a chance to win every night. Obviously, the play that stands out to me is that save at the end of the game on Scheifele. Obviously, a game saver. He's been doing that for us down the stretch. That's awesome to have a guy like that back there, it gives us a lot of confidence."
David Perron, who tied it for St. Louis early in the third period, smiled when asked why Binnington appeared so calm in his first NHL playoff game.
"It's his personality, probably," he said. "And I think he's just enjoying the ride, too, right now. We need this. He's playing great for us. We need him to keep going like this. And it was cool to see how he played, even with the fans getting on him a little bit with puck plays and different things.
"He got scored on, that first goal, and still kept playing. Amazing."