The injury to Chris Carpenter is being called a right triceps strain.
Triceps strains, like an injury, vary in severity. If it's mild, he should only miss one start. A stint on the disabled list appears likely.
Chris Carpenter was pulled in the sixth inning of Sunday night's game after a meeting on the mound with head trainer Barry Weinberg and manager Tony La Russa.
After throwing an inside breaking ball, his 66th pitch of the game, Carpenter called for the trainers. He then put his hand to his upper arm, indicating something to Weinberg. It doesn't appear to have anything to do with his reconstructed elbow, but we'll keep you updated.