Oscar McKinley Charleston (October 14, 1896 – October 5, 1954) was an American center fielder and manager in Negro league baseball. In 1915, after serving three years in the U.S. Army, the Indianapolis, Indiana, native continued his baseball career as a professional with the Indianapolis ABCs; his career ended in 1954 as a player-manager for the Indianapolis Clowns. In addition to a forty-three-year career with more than a dozen teams, including the Homestead Grays and the Pittsburgh Crawfords, Negro league baseball's leading teams in the 1930s, he played nine winter seasons in Cuba and in numerous exhibition games against white major leaguers. Charleston was known for his strengths as a hitter and center fielder. He was inducted into the National Baseball Hall of Fame in 1976.
Highlights of Charleston's career included playing in the Negro National League's inaugural doubleheader on May 20, 1920. His most productive season was with the Saint Louis Giants in 1921, when he hit fifteen home runs, twelve triples, and seventeen doubles, stole thirty-one bases, and had a .437 batting average. In 1933 Charleston played in the first Negro National League All-Star Game at Chicago's Comiskey Park and appeared in the League's 1934 and 1935 all-star games. In 1945 Charleston became manager of the Brooklyn Brown Dodgers and helped recruit black ballplayers such as Roy Campanella to join the first integrated Major League Baseball teams.