LAS VEGAS, NV - APRIL 17: Boxer Floyd Mayweather Jr. works out at the Mayweather Boxing Club on April 17, 2013 in Las Vegas, Nevada. Mayweather Jr. will fight Robert Guerrero for the WBC welterweight title at the MGM Grand Garden Arena on May 4, 2013. (Photo by Bryan Haraway/Getty Images)
Floyd Mayweather Jr.'s media workout before bout with Robert Guerrero
Floyd Mayweather Jr. prepares for Robert Guerrero in his first fight on Showtime since leaving HBO.