Arauz gets the call because he's on the 40 AND plays adequate defense. If Xander went down with a long term injury, I bet they'd call up Arauz and have him bat 9th.
Ockimey would have to hit first. It hasn't looked good so far. Would they consider promoting mediocre Tate Matheny since he can play all over the place and it's not going to affect his development?
I think he didn't spend large this offseason on SP was less due to our prospects and more due to it not being the right year to open the checkbook. I think it's likely that he grabs a big name arm or two the next two offseasons.