St. Louis, 38, entered Thursday with 25 goals, 54 points, and a plus-16 rating.
Giroux, 26, began the night with 18 goals, 55 points, and a minus-1 rating. He had 14 goals and 37 points in his last 30 games.
"I didn't give myself hope," Giroux said. "I didn't want to be disappointed again. That's unfortunate for Steven. He worked hard to come back and wanted to make the team and come back and play. It's too bad for him."
Timonen returns. Kimmo Timonen returned to the lineup Thursday against Colorado. He had missed the previous two games with a bruised left foot.
The veteran defenseman was paired with Braydon Coburn, while Andrej Meszaros - who has played well - was a healthy scratch.
Timonen blocked six shots in Thursday's win.
Tribute to Allen. Before the game, a video tribute to former Flyers coach and general manager Keith Allen was shown, along with classic photos. Public-address announcer Lou Nolan narrated Allen's accomplishments with the Flyers.
Allen, 90, died Tuesday.
"I'm really going to miss him, and I know he's in a better place," Snider said in the video. "I love Keith Allen, and we're grateful for what he did for the organization."
Fittingly, "God Bless America" was performed before the game. It became the Flyers' good-luck anthem during Allen's time with the club.
Breakaways. Colorado's Max Talbot, a former Flyer, said that his fiancee is expecting their first child in a few days and that it will be a home birth. "I just hope it looks like me," Talbot cracked.