Mark Prior yesterday underwent successful right shoulder arthroscopy performed by Dr. James Andrews in Birmingham, AL. During the arthroscopy, Dr. Andrews performed a debridement of Mark's right rotator cuff as well as repair of labral and capsular injuries in his right shoulder.
Mark today began a comprehensive rehabilitation program in Birmingham overseen by Dr. Andrews and the Cubs medical staff.
Mark will not pitch in 2007 and will continue his rehabilitation program into the offseason.