Floyd Jr Mayweather

It came as fast and swift as a punch thrown seconds after the opening bell. Boxer Floyd Mayweather held a media conference call Tuesday to promote his return to the ring Sept. 19 at Las Vegas' MGM Grand in a welterweight fight against Juan Manuel Marquez, but questions about two separate police cases quickly came up. "My main thing is to focus on the fight," Mayweather said. "Anything else, I'm not worried about. I try to focus on positive things." Las Vegas police are investigating a shooting outside a skating rink, and last week seized two handguns, ammunition and two bulletproof vests from Mayweather's home and two cars.