Henrik Zetterberg will miss at least two weeks with a back injury leaving the Detroit Red Wings without their top two scorers for the time being. Fellow center Pavel Datsyuk remains out because of a concussion. Zetterberg has 11 goals and 19 assists for a team high 30 points this season. There is no timetable for Datsyuk's return. The Red Wings host Philadelphia on Wednesday night. The Red Wings have recalled center Cory Emmerton from their Grand Rapids farm club.