St. Louis has won just two of its last 12 games (2-9-1), including a 3-2 overtime victory over lowly Pittsburgh on Saturday.
The Blues, who at one point were challenging Detroit for first place in the Central Division, now sit 12 points back. They are one point behind eighth-place Nashville in the race for the final playoff spot in the Western Conference.
St. Louis squandered a two-goal lead on Saturday before Eric Boguniecki netted the game-winner with 2:54 left in the extra period.
Pittsburgh lost its 14th straight game.
“When the game was on the line it was almost like we were getting nervous and on our heels a little bit instead of proactive,” Blues coach Joel Quenneville said. “We’ll take a win out of it and hopefully that can help us, but we weren’t crazy about how we played the last half of the game.”
The Blues have been outscored 36-16 over their last 12 games.
St. Louis will now turn its attention to beating Phoenix for the first time in four tries this season. The Coyotes beat the Blues twice in overtime at home and earned a 1-1 tie at the Savvis Center on Dec. 20.
“They’ve got a good team,” Blues goaltender Chris Osgood said of the Coyotes. “They have a lot of guys who are talented and fast and they have a good goalie. Their defense is young and mean.”
On Saturday, Phoenix snapped an eight-game winless streak (0-6-1-1) and ended Dallas’ eight-game unbeaten run with a 3-2 victory at home.
Comrie, a 23-year-old center, was acquired from Philadelphia in the Sean Burke trade on Tuesday, the same day Phoenix general manager Bobby Clarke dealt defenseman Eric Weinrich to St. Louis for a fifth-round pick in the 2004 draft.