Crosby was hurt during a 5-3 victory in Philadelphia on Monday night. He was optimistic on Tuesday that he would be ready to play against the Bruins, but during the pre-game morning skate coach Michel Therrien decided that Crosby wouldn't play. The 19-year-old centre's status is uncertain for games Friday at the New York Islanders and Saturday at home against the New York Rangers.
Crosby is fourth in the NHL in scoring with 10 goals and 20 assists in 19 games. He is the leading vote-getter among Eastern Conference players in fan balloting for the all-star game in January.
Crosby played in 81 of the team's 82 games last season.