Im thinking it's to see exactly what we have in him. He had a solid year at AA in 2010, then repeated it again this year, despite being 27 years old. He had a tremendous season in AA this year, but of course that age ... So Im sure it's to test him and just see how good he may actually be.
It could prepare him to push for a spot, but I think he moves up to Syracuse next year and will be ready when someone goes down with an injury or is ineffective.