I would keep Casillas, but definitely look at moving Chris White out and bringing back James Anderson.
Is Chris White really that much aof a necessity now that they have Casillas? ST's are bursting with talent - - hell, even an ace like Don Jones was a healthy scratch last week. Why not cut White and bring Anderson back (unless the coaching staff really hated him). We are still one injury away at MLB from being very thin, and it would be great to have a full-time depth guy there now that Mayo is out. Ayers is more of an OLB.