Bartolo Colón active players as of June 11, 2008. Colón did not pitch in 2010 due to ongoing right shoulder and elbow pain and damage to the rotator cuff, ligaments and tendons. In March 2010, he received a transplant of stem cells to repair the damaged tissues in his right shoulder. The orthopedic surgeon who performed the surgery said he had used human growth hormone in previous surgeries of the same type but not with Colón. The surgery was scrutinized by MLB but no wrongdoing was found. Colón then played in the Pre-World Championship in Puerto Rico, winter ball with the Aguilas
Rotator cuff is divided from the remainder of the rotator cuff origins as it is deep to the scapula. The four tendons of these muscles converge to form the rotator cuff tendon. These tendinous insertions along with the articular capsule, the coracohumeral ligament, and the glenohumeral ligament complex, blend into a confluent sheet before insertion into the humeral tuberosities. The insertion site of the rotator cuff tendon at the greater tuberosity is often referred to as the footprint. The infraspinatus and teres minor fuse near their musculotendinous junctions, while the supraspinatus and subscapularis tendons join as a sheath that surrounds the biceps