Veteran major-league outfielder Jose Guillen, who played part of the 2003 season for the division-champion A's, bought thousands of dollars of steroids and human growth hormone from a troubled Florida anti-aging clinic and had some of the drugs shipped to the Oakland Coliseum, business records show. Two other major-league players who have since retired also bought performance-enhancing drugs from the Palm Beach Rejuvenation Center, which was targeted this year in a law-enforcement investigation of suspected illegal drug sales. Matt Williams, the Giants' star third baseman for 10 years, bought $11,600 worth of growth hormone, steroids and other drugs in 2002 when he was playing for the Arizona Diamondbacks, according to the records. In a phone interview Monday, Williams said a doctor advised him to try growth hormone to heal a serious ankle injury he suffered during spring training in 2002.