There's definitely more to this story than what is being told. His "illness" is not life threatening, so if he was planning on resigning why wouldn't he wait to announce this until after NSD? Think about it... it defies all logic. Either way he was only going to coach one more game (the Sugar Bowl). This would allow them to keep the recruits as well as plan for a replacement. To announce it when he did just doesn't make sense. I'm guessing he and Foley were possibly having some discussions that weren't going well, or as previously stated, he has concerns that the next year or two are going to be difficult at UF and he's trying to avoid them.