One of the reasons that Renyel was sent down to the minors after spring training was his pitching mechanics.
"You hate to judge someone's stuff the first time they go out. The ball a lot of times feels like a foreign object. After the first couple of hitters he threw strikes and got ahead. ... We'll have to wait and see how he does the next few times he goes out."
[Edit]: Removed the incorrect crap I had written. A big thanks to Dr F for catching my mistake.