But Winnipeg's 5-on-5 play did not match that of St. Louis, and goalie Connor Hellebuyck had two of the four goals he allowed go through him.
"I would like every single goal I ever let in back," said Hellebuyck, who made 28 saves. "That's kind of a loaded question. I'm going to prepare the same way and make sure my game's right, and we're gonna take it to them."
O'Reilly scored the game-winner on a snap shot to the blocker side with Hellebuyck partially screened on a rush that didn't look all that dangerous.
Hellebuyck bristled when asked about that goal.
"I really don't like that question," he said. "I'm going to remain positive here. It's only 2-0. There's a lot of hockey left to be played. We've got to focus on getting four, and so do they. We're going to continue fighting."
The Jets earned home-ice advantage for the first round by finishing second in the Central Division, ahead of the Blues, but the advantage is gone, and history suggests it will be more than a little difficult to overcome.
"We have a lot of belief in the team we have in here," forward Adam Lowry said. "It's a tough hole to come out of, but some pretty good teams have come out of it. You look at where [the] Tampa [Bay Lightning are] right now (down 2-0 to the Columbus Blue Jackets in the Eastern Conference First Round). It's going to be a test, but we're looking forward to going into St. Louis and trying to steal it from them."
Lowry acknowledged that the difficulty of being down 2-0 will be compounded by the hostile environment that awaits them in St. Louis.
"Their fans are going to be excited for their first game," he said. "I think it's going to be similar how we came out in Game 1 and Game 2, they're going to be revved up, they might be on the body a little bit more. But at the same time, sometimes you make mistakes when you're running around trying to chase hits. It's about weathering that storm and kind of killing that momentum. You want to play in a silent building. So if we can silence the crowd early, that's going to be a good thing."