From Rotowire c/o Yahoo:
"Penny left Wednesday's game in the fourth inning with nerve irritation in his upper right arm, the Associated Press reports.
He was making his first start since he was sidelined Aug. 8 with a strained right biceps. There was no immediate word on the severity of the injury."
And he was pretty ineffective when he was in there. Glad I didn't start him. I just dumped him so I could spot-start Rusch against the Amazin's Friday.