Ty Murray was born to be a rodeo star -- in fact, his first words were "I'm a bull rider." Before he was even out of diapers, he was climbing atop his mother's Singer sewing machine case, which just so happened to be the perfect mechanical bull for a 13-month-old. Before long, Ty was winning peewee events by the hatful, and his special talent was obvious...obvious even to a man called Larry Mahan. At the time the greatest living rodeo legend,...