Not surprisingly, Backes did not participate in the Blues' practice on Wednesday, Lou Korac of the Blues' official site reports. The practice was only optional for the Blues so this may have been a rest day for Backes after being removed from Tuesday's game against the Stars with an apparent head injury. Given that it is a head injury, Backes will have to through the concussion protocols, which places his status for Thursday's game against the Ducks in jeopardy. The 30-year-old winger has scored two goals and three assists in eight games played this season.