Parayko scored short-handed to give the Blues a 1-0 lead at 2:37 of the first period, skating the length of the ice and beating Lindgren with a wrist shot from the top of the right circle off a 2-on-1 with Thomas.
"Puck coming through the middle, just trying to get a stick on it and then saw a little room so I decided to take it," Parayko said. "I didn't know 'Tommer' was coming, but I think they had a guy coming back and I wasn't moving too fast out there so I think he caught us. So, I just slowly cut it in and thought I could shoot."
Schenn's one-timer from the right circle on a delayed penalty made it 2-0 at 7:44 of the second period after working the puck around the perimeter with Pavel Buchnevich and Justin Faulk.
"Good patience there by 'Buchy,' good pass by 'Faulker,'" Schenn said. "I had a couple, in the past couple games, a couple one-timers from that side that I really didn't like and wasn't really able to get a hold of, but I felt like I got a hold of that one and I was able to beat Lindgren."
Neighbours made it 3-0 with a power-play goal at 15:51 of the third when he redirected Thomas’ wrist shot from the left point past Lindgren.
"I’d say it almost felt like they flipped the script on us tonight," Lindgren said of the Blues. "It wasn’t our best start tonight.
"We knew it would be tough here. It’s a tough place to play. We all know that we can be better."
NOTES: The short-handed goal was Parayko's first in the NHL. ... Capitals defenseman Joel Edmundson returned after missing one game with an upper-body injury, and forward Beck Malenstyn also returned after missing one game for personal reasons. ... St. Louis honored three inductees into the 2024 class of the Blues Hall of Fame: goalie Mike Liut, forward Keith Tkachuk and the late Pavol Demitra, who was represented by his wife and two children.