Fabbri is out indefinitely with his concussion injury, Jeremy Rutherford of the St. Louis Post-Dispatch reports.

EDGE Analysis

Fabbri took an elbow to the head in Saturday's game against Minnesota, apparently leading to the injury. It's an unfortunate development for Fabbri, as he made the team out of training camp and could have made an immediate impact for the Blues as a quick-skating center with great hands, a scorer's touch and rigid work ethic. He still has appeal in deeper leagues and dynasty formats for those willing to wait out the injury.