What drives Floyd Mayweather Jr.? Legacy building — and a fleet of cars

Mayweather brings his 45-0 record into Saturday night's pay-per-view welterweight fight against Marcos Maidana as the world's highest-paid athlete. LAS VEGAS — In a room just off the lobby of the MGM Grand Hotel this week, boxer Floyd Mayweather Jr. eased back on a couch and prepared to talk to a large cluster of sportswriters. An assistant handed him a tall coffee, and Mayweather, a true sweet scientist, stirred in half a dozen packets of sugar.