Boxing-Mayweather returns to ring in September against Berto

Aug 4 (Reuters) - Floyd "Money" Mayweather (48-0) will put his unbeaten record on the line when he steps into the ring to face Andre Berto in Las Vegas on Sept. 12 in what could be the final fight of his career, it was announced on Tuesday. Mayweather, who beat Manny Pacquiao in May in what was billed as the "Fight of the Century", will put his WBC and WBA welterweight world titles on the line against power-punching, two-time welterweight world champion Berto (30-3) at the MGM Grand Garden Arena. A victory for Mayweather would match the record of the late heavyweight champion Rocky Marciano, who retired in April 1956 with an unblemished record of 49-0. "I'm ready to get back in the ring on September 12 and prove again to the whole world why I'm 'The Best Ever,'" said Mayweather. "I always bring my A-game and this fight against Andre Berto is no exception. "He's a young, strong fighter who is hungry to take down the best. Forty-eight have tried before and on September 12, I'm going to make it 49." (Reporting by Larry Fine in New York; Editing by Steve Keating)