Penguins captain Sidney Crosby is expected to be sidelined for a week because of a concussion, according to an ESPN.com report. Crosby, who leads the NHL with 32 goals and 66 points, missed the Penguins' loss in Montreal on Thursday night. He flew back to Pittsburgh to be re-evaluated by team doctors, who updated coach Dan Bylsma about the extent of Crosby's injury following the game.