He's probably at his end right now. Don't forget that he was pitching in college this year. Peter Gammons told him not to worry about anything right now in that he doesn't have his stuff going right now. His arm angle is off, no good slider and his FB isn't even at it's top velocity.
It's a good education for him though and he can certainly learn a lot about the big leagues from hanging around some veterans. Be on the lookout for him in 2006/07 with Delcarmen
I do feel better with Arroyo available out of the pen.