As Tiger Woods broke down in tears on the 18th green at Royal Liverpool Golf Club, legions of spectators strained their eyes to read the emotion on his face. Like the millions watching on television, they knew that Tiger had just won the British Open, and that his father had recently died. Beyond that, however, they knew precious little -- only that he played with a Nike golf ball, carried an American Express card in his wallet, and, presumably, drove a Buick. They were hungry for more, but everything else about his off-course life, and those of his fellow pros, was forbiddingly well-guarded....