Wizards center Emeka Okafor is out indefinitely with a herniated disc, and forward Chris Singleton will be sidelined six to eight weeks by a broken bone in his left foot. The Wizards said Wednesday that Okafor's injury was diagnosed by an MRI after he experienced discomfort in his neck. The team said Okafor will begin rehabilitation to reduce inflammation and correct the injury but gave no timetable for his return.