I must have tuned out just before Keith's statement. (I watched the postgame until the first commercial break.) My sense is that Keith didn't want to just disappear without saying good-bye to the viewers, but he also didn't know if he is actually going to disappear. So he said, I hope I come back, but I might not, and if I don't, I wanted to say that it's been fun. I don't see anything wrong with it. It may not have been something a polished broadcaster would have done, but Keith isn't polished, and that's a large part of his charm.