Las Vegas, Nev.: Floyd Mayweather, Jr. and WBA welterweight champion "Sugar" Shane Mosley arrived at the MGM Grand today, kicking off Fight Week for their May 1 showdown on HBO pay-per-view. Mosley's first fight since last January. Mayweather returns to the ring for the first time since last September. Photos © Chris Cozzone/Fightwireimages.com