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).

In his career, Patterson posted a 39–40 record with a 4.08 ERA and 28 saves in 559 appearances, including a 2.68 strikeout-to-walk ratio (483-to-180), 175 games finished, and 617+1⁄3 innings.

Patterson would spend his time in the bullpen during games repairing and relacing gloves, sometimes incorporating coat hangers, tongue depressors, and extra leather.