John Calvin Klippstein (October 17, 1927 – October 10, 2003) was an Americanpitcher in Major League Baseball (mostly as a reliever) for a number of teams throughout his career. The most prominent portion of his career was spent early on with the Chicago Cubs (1950–1954). In 18 years, he finished with a 101–118 record and a 4.24 ERA in 711 games (161 starts). He had 1158 strikeouts in 1,967 2/3 innings pitched. Klippstein was often known for his control problems.