The reports from Casey were pretty damning I thought. He was told what to do, he knew what to do but for one reason or another didn't do it.
He definitely tried to takle the game on but was at the expense of being seen as selfish. And of course if you cant cover both ways you have no part in Roos' plans I would think.
A sensible decision. We need to make quick decisions on a bunch of these NQRs. After 5 yrs he could be off on free agency soon in any case ...