Damaged rotator cuff muscles can be surgically repaired. Squeezing of the rotator cuff is called impingement syndrome. A rotator cuff tear can be caused by the weakening of the rotator cuff tendons. Such spurs suggest chronic severe rotator cuff disease. Many rotator cuff tears have no symptoms. Injury to the rotator cuff results from repeated trauma and overuse. They appear to have little benefit in tendinitis of the rotator cuff. Blyleven missed the entire season following rotator cuff surgery. The infraspinatus is the main external rotator of the shoulder. Recurrent lifting and overhead motions are at risk for rotator cuff injury as well. They may be caused by strength imbalance of the rotator cuff muscles. There is consensus amongst orthopaedic surgeons and physical therapists regarding rotator cuff repair rehabilitation protocols. On August 11, deGrom went on the disabled list with rotator cuff tendinitis. Further, calcification in the subacromial space and rotator cuff may be revealed. Intrinsic factors refer to injury mechanisms that occur within the rotator cuff itself.