Chris Carpenter's sore shoulder is sending him to the disabled list:

Team trainers have described Carpenter's condition as scapulothoracic bursitis - inflammation of a bursa sac between his right shoulder and rib cage. The area had become swollen and created what trainer Barry Weinberg described as "a clicking" sensation when Carpenter pitched. Carpenter admitted after his last start May 19 in Kansas City that he had been uneasy about his mechanics for some time.

If Carpenter's recovery allows him to throw within the next several days, he could return to the rotation by next week's series against the Cincinnati Reds.