On Saturday, the Padres acquired veteran right-hander Scott Williamson from the Cubs in exchange for a pair of Class A pitchers. Going to Chicago are Fabian Jimenez, 19, and Joel Santo, 22. Both have been pitching at Fort Wayne. Williamson, 30, is 2-3 with a 5.08 ERA in 28 1/3 innings, appearing in 31 games for the Cubs.