Chris Carpenter returns to the mound on Friday, after undergoing thoracic outlet surgery on July 19. That surgery involved the removal of a rib.

So what do you do with a rib? Carpenter kept it as a souvenir for his daughter.

Carpenter told FOX Sports Midwest he kept it because his "daughter asked to bring something back from the hospital, and she said a rib. So I brought my rib back."

Carpenter says it's sitting in a jar in his bathroom, and that at some point "we'll make it a necklace or bracelets or something."