Big Bear, Calif. ---  Three-division world champion "Sugar" Shane Mosley,Pomona,Ca. works out with trainer Nazim Richardson during a jam-packed media day at his high-altitude training compound in Big Bear, Ca. Tuesday. Mosley is in intense preparation for his upcoming World Welterweight mega fight against Superstar Manny Pacquiao on Saturday, May 7 at the MGM Grand in Las Vegas.  Pacquiao vs Mosley is promoted by Top Rank in association with MP Promotions, Sugar Shane Mosley Promotions, Tecate and MGM Grand.  The Pacquiao vs Mosley telecast will be available live on SHOWTIME Pay Per View.  --- Photos by Chris Farina/Top Rank