"Sidney Crosby is the face of the National Hockey League, but once again, his head has become the issue.

Crosby, the Penguins' star center who missed 11 months because of a concussion, is out indefinitely because of recurring symptoms, the team announced on Monday.

Headaches resurfaced since he took an elbow to the head from the Boston Bruins David Krejci on Dec. 5, Crosby said at his locker room stall at Consol Energy Center.

"The next day, after the game, I didn't feel right," he said. However, a subsequent medical test showed no serious injury, he added."