Originally Posted by NeilHamburger
Rolen (back when he was with the Cardinals) originally screwed up his shoulder by colliding with the Cubs Hee Sop Choi, and was never the same again. His shoulder and eventually his back were toast.
Medical science still has a lot of trouble with shoulders and backs. If it's as bad as Rolen's shoulder it could essentially end his career.
Rolen played what, 6 years after he left the Cardinals? He certainly wasn't the same guy, but it didn't come close to ending his career.