Update On Tyler Austin's AZFL Exit

Yep.  It's a problem with his wrist.

The word on Tyler Austin is it's the wrist flaring up again. It's not serious, but they wanted to shut him down for precautionary reasons.
— Josh Norris (@jnorris427) October 23, 2013

Oh it's not serious?  That's good news.  Except that if it wasn't that serious you wouldn't be removing him from the fall league so he wasn't at risk of re-injuring it.  Ask Mark Teixeira about those non-serious wrist injuries.  See how well rest and recuperation worked for him.