Blues netminder Jaroslav Halak, who just returned from an injury four games ago, skated off early at practice on Wednesday at St. Louis Mills. Halak did not play for 13 days with what was listed as an "upper body injury," before returning against the Panthers in Florida. It was suspected the problem was some kind of injury to his glove hand or wrist. It is not known whether he simply tweaked the previous injury or sustained another. There was speculation he might have strained his back during practice on Monday. After the workout, Blues coach Davis Payne indicated it was not necessarily a serious injury. "We're just calling it an upper body injury," Payne said, "and he is day to day." Payne suggested Halak could possibly still be in the lineup on Friday when the Blues play at Buffalo.