John Calvin Klippstein (October 17, 1927 – October 10, 2003) was an American professional baseballpitcher (mostly a reliever), who played in Major League Baseball (MLB) for a number of teams, over an 18-season career. The most prominent portion of his early career was spent with the Chicago Cubs (1950–1954). Klippstein’s career stat line included a 101–118 record, with a 4.24 earned run average (ERA), in 711 games (161 of them as a starter). He had 1,158 strikeouts in 1,967+2⁄3innings pitched. Klippstein was often known for his control problems.