FILE - In this Dec. 5, 2011, file photo, Pittsburgh Penguins' Sidney Crosby prepares to take a face off during an NHL hockey game against the Boston Bruins in Pittsburgh. Crosby, once the youthful face of the future of the NHL, is dealing with a recurrence of concussion-like symptoms. (AP Photo/Gene J. Puskar, File)

FILE - In this Dec. 5, 2011, file photo, Pittsburgh Penguins' Sidney Crosby prepares to take a face off during an NHL hockey game against the Boston Bruins in Pittsburgh. Crosby, once the youthful face of the future of the NHL, is dealing with a recurrence of concussion-like symptoms. (AP Photo/Gene J. Puskar, File)