Here is an interesting story form TSN...
http://www.tsn.ca/mlb/story/?id=2499...=secStory_main
"Marcum, who left Tuesday's start with forearm tightness and numbness in his pinky finger, underwent an MRI Thursday and Dr. James Andrews was to give the results a second opinion.
GM J.P. Ricciardi refused to offer any details pending Andrews' assessment, but the grim tone with which both he and manager Cito Gaston spoke didn't bode well for the right-hander.
"The way he had to leave the game, the numbness in his fingers and elbow, there's always a fear," said Gaston. "We're just hoping it's not as bad as we're all thinking it might be.""