MAYHEM: Mayweather vs. Maidana 2, a 12-round world championship bout for Mayweather’s 147-pound titles taking place Saturday, September 13 at MGM Grand in Las Vegas, is promoted by Mayweather Promotions, Golden Boy Promotions and sponsored by Corona. The event will be produced and distributed live by SHOWTIME PPV® and is the fourth fight of a lucrative six-fight deal between Mayweather and Showtime Networks Inc.