Marvin Edward Grissom was an American professional baseball pitcher and pitching coach. During his active career he appeared in 356 games in Major League Baseball for the New York / San Francisco Giants, Detroit Tigers (1949), Chicago White Sox (1952), Boston Red Sox (1953) and St. Louis Cardinals (1959). Born in Los Molinos, California, he threw and batted right-handed, stood 6 feet 3 inches (1.91 m) tall and weighed 190 pounds (86 kg). An elder brother, Lee, was a left-handed pitcher for four MLB teams between 1934 and 1941; in addition, a nephew, Jim Davis, also a southpaw, pitched for three National League clubs in the mid-1950s and was Marv Grissom's teammate with the 1957 New York Giants.

The 1954 World Series matched the National League champion New York Giants against the American League champion Cleveland Indians. The Giants swept the Series in four games to win their first championship since 1933, defeating the heavily favored Indians, who had won an AL-record 111 games in the 154-game regular season.