In addition to a 3-1 loss at Carolina Friday, the Blues left town with what appeared could be a serious injury to Vladimir Sobotka.

With 1 minute, 22 seconds left in regulation, Sobotka was hunting down a puck behind the Carolina net and was inadvertently tripped by the stick blade of Hurricanes' Justin Faulk.

Sobotka crashed into the boards awkwardly, banging his left knee into the wall. After being tended to by Blues trainer Ray Barile, Sobotka took a seat on the bench, but then needed help from teammate Derek Roy skating off the ice at the end of the game. He wasn't putting pressure on his left leg.

Sobotka will not play tonight when the Blues host the Nashville Predators at Scottrade Center, but the news Saturday morning didn't seem as ominous as first feared. He is being listed as day to day and will be seen by the Blues' doctors this weekend.

"We'll evaluate him (Sunday) and have a further update," Blues coach Ken Hitchcock said. "So he won't play tonight ... and then we'll let everybody know where he's at (Sunday) after we get a further evaluation."

Ryan Reaves will take Sobotka's spot in the lineup tonight, after sitting out the past two games as a healthy scratch.

Hitchcock believes that the sequence leading to Sobotka's injury was a "hockey play gone bad," meaning there was no ill-intent on Faulk's part.

"It happens," Hitchcock said. "The player that he went up against the boards, that's not that player's personality at all."

For the time being, the Blues are not making a minor-league call-up, which could mean that they believe Sobotka's injury isn't serious.