Michalek (concussion) exercised the last three days and was schedule to skate Monday before being traded, Sarah McLellan of the Arizona Republic reports. Michalek was moved to the Blues in exchange for prospect Maxim Letunov and a conditional 2015 third-round draft pick. While he doesn't have a set timetable for return, his progress towards a return is encouraging and it seems plausible he could return at some point in the near future.