If he wanted to exit the game he simply would have called for a substitute. There is no "tactical" reason for a player to get himself red-carded out of a match and leave his team playing a man short.
~ Blue Jays ~
Not similar, but I read many moons ago that the Mick (#7 of the NY Yankees) purposely argued balls and strikes one time after he was still a "little" sauced during a day game after a night of heavy partying. Apparently he wanted to get tossed in order to save the embarasment of not being able to play to expectations.