A 1950s stamp commemorates the Subway Series of the 1950s (although the stamp names the Yankees and Dodgers, it was the Giants who faced the Yankees in 1951).
New York dominated baseball in the 1950s, fielding three major league teams for most of the decade. At least one New York team played in every World Series between 1950 and 1958, and five of those series pitted the American League’s New York Yankees against either the Brooklyn Dodgers or New York Giants. These became known as “Subway Series” because fans could ride public transit to all the games.