He had a "minor" stroke in 2009. Although they claimed it did no permanent damage, I think it's safe to say he is not as sharp as he was before the attack. From what I've read, he still works very hard to prepare for the show. (Like any color guy, you can agree or disagree with his opinions -- that's part of the fun.) Anyway, if he has lapses -- and it sure looks like he does -- it probably has more to do with fatigue.