Bill Belichick resigned as the Jets head coach after one day

Bill Belichick — ever heard of him? — was the head coach of the New York Jets once. Literally, once. For one day. He accepted the head coaching job after Bill Parcells stepped down and then, exactly one day later, he surprised the media in his introductory press conference by resigning his position.
Here was the piece announcing his hiring (which doubles as the funniest in-retrospect headline ever)