Franklin Leal Sullivan (January 23, 1930 – January 19, 2016), was an American professional baseball right-handed pitcher, who played in Major League Baseball (MLB) for the Boston Red Sox, Philadelphia Phillies, and Minnesota Twins over parts of eleven seasons, spanning 1953–1963.

Sullivan was named to the American League (AL) All-Star team, in 1955 and 1956, and was elected to the Boston Red Sox Hall of Fame, in 2008.

After the 1960 season, the Red Sox traded him to the Phillies for another towering right-hander, 6 ft 8 in (2.03 m)-tall Gene Conley.

A walk-off home run by Stan Musial on the first pitch from Sullivan in the bottom of the 12th inning brought the midsummer classic to an abrupt end.

Sullivan had entered the game with two men out in the eighth and had held the National League (NL) scoreless for 31⁄3 innings prior to Musial’s clout.