Robert Chandler Patterson (born May 16, 1959) is an American former professional baseball player. He played all or part of 13 seasons in Major League Baseball (MLB) between 1985 and 1998, primarily as a middle-relief pitcher. He played for the San Diego Padres (1985), Pittsburgh Pirates (1986–92), Texas Rangers (1993), California Angels (1994–95) and Chicago Cubs (1996–98). He batted right-handed and threw left-handed. He was a good fielding pitcher in his major league career. He committed only one error in 98 total chances for a .990 fielding percentage.