"I can lick any son-of-a-bitch in the world."So boasted John L. Sullivan, the first modern heavyweight boxing champion of the world, a man who was the gold standard of American sports for more than a decade and the first athlete to earn more than a million dollars. He had a big ego, a big mouth, and even bigger appetites. His womanizing, drunken escapades, and chronic police-blotter presence were godsends to a burgeoning newspaper industry. The larger-than-life boxer embodied the A...