I've left three games early.
But did he stay for the whole game each time?
1.) at Kentucky 2005: My future wife's grandfather died two days before the game, I basically drove all the way to Lexington on Saturday, went to the game, and drove back with a four or five hour sleep stop in Nashville. It was the quintessential Sylvester Croom game, and I was so disgusted I left with a minute or two left once we could not win. It was a awfully officiated game, and my lack of patience paid off by my being able to lock eye contact with head ref Rocky D. Goode as the referee van peeled away from Commonwealth Stadium, and I gave him the ol' middle-finger salute.
2.) at Alabama 2010: My wife was nine-months-and-a-couple-of-days pregnant. I waited as long as I could before leaving the house, and left after the first MSU possession of the 2nd half. As I was walking into the portal to leave, I think Alabama was in the process of busting out a long touchdown play. I hoofed it down the stairs and got home as quick as I could.
3.) Tennessee-Martin 2011: It was a lot to a little, and through a series of misadventures (mostly involving me forgetting things), we were parked at the research park, so we split a little early to catch the bus back. But along the way we got handed some leftover Little Caesars pizzas for free, so yay!