 He recorded a .985 Fielding Percentage at all 3 outfield positions in his major league career.After his major league career, Rettenmund served as hitting coach for the Texas Rangers (1983–85), the Athletics (1989–90), the Padres (1991–99), the Atlanta Braves (2000–01), and the Detroit Tigers (2002).After three years out of the majors, Rettenmund returned as hitting coach of the Padres in June, 2006, replacing Dave Magadan.