Jim Lonborg (born April 16, 1942) is a former Major League Baseball right-handed starting pitcher who played with the Boston Red Sox (1965-71), Milwaukee Brewers (1972) and Philadelphia Phillies (1973-79).
Born in Santa Maria, California, Lonborg graduated from Stanford University. He enjoyed his best year in the 1967 Red Sox' "Impossible Dream" season, when he led American League pitchers in wins (22), games started (39), and strikeouts (246). In the World Series against the St. Louis Cardinals, he pitched what was only the fourth one-hitter in Series history. In addition, he received the Cy Young Award, played in the All-Star game, and finished prominently in voting for the MVP award (6th in the voting).
In his 15-year career, Lonborg compiled a 157-137 record with 1475 strikeouts, a 3.86 ERA, 24 complete games, 15 shutouts, and 2464.1 innings in 425 games. Currently, he works as a dentist in Hanover, Massachusetts.
Jim Lonborg was selected to the Boston Red Sox Hall of Fame in 2002.