Martin Whiteford "Mr. Shortstop" Marion (December 1, 1917 – March 15, 2011) was an American Major League Baseball shortstop and manager. Marion played for the St. Louis Cardinals and the St. Louis Browns between 1940–1953. He was a defensive stalwart of the Cardinals' dynasty in the 1940s, which saw them win three World Series in a five year span, and was named the National League Most Valuable Player in 1944, the first shortstop in the history of the National League to win the award. Marion managed the Cardinals in 1951, the Browns from June 10, 1952, through 1953, and the Chicago White Sox from September 14, 1954 through 1956. During his career, he batted and threw right-handed, stood 6 feet 2 inches (1.88 m) tall and weighed 170 pounds (77 kg).