The St. Louis Blues lineup took another blow Saturday when David Backes suffered an undisclosed upper-body injury, according to the St. Louis Post-Dispatch's Jeremy Rutherford.
It's not clear exactly when the injury occurred during the Blues' 5-4 win over the Chicago Blackhawks, but Backes missed a good chunk of the third period. The Blues recalled Sergei Andronov on an emergency basis from the AHL during the game. The Blues will reevaluate his injury later on Sunday.
Injury issues are a new phenomenon for Backes, who has missed only three games in the last six seasons. The Blues captain was injured a couple of weeks ago following a collision with Ottawa Senators forward Colin Greening, but returned for the Blues' last three games.
Losing Backes for an extended period of time would further cripple a Blues squad struggling to stay healthy. Alex Steen was ruled out indefinitely with a concussion on Saturday.