The Cincinnati Reds win the World Series, resulting in the Black Sox Scandal.

The Cincinnati Reds are an American professional baseball team based in Cincinnati. The Reds compete in Major League Baseball (MLB) as a member club of the National League (NL) Central Division. They were a charter member of the American Association in 1881 before joining the NL in 1890.

The 1919 World Series was the championship series in Major League Baseball (MLB) for the 1919 season. The 16th edition of the World Series, it matched the American League champion Chicago White Sox against the National League champion Cincinnati Reds. Although most World Series have been of the best-of-seven format, the 1919 World Series was a best-of-nine series. National Commission decided to try the best-of-nine format partly to increase popularity of the sport and partly to generate more revenue.

The Black Sox Scandal was a game-fixing scandal in Major League Baseball (MLB) in which eight members of the Chicago White Sox were accused of intentionally losing the 1919 World Series against the Cincinnati Reds in exchange for payment from a gambling syndicate, possibly led by organized crime figure Arnold Rothstein. There is strong evidence both for and against Rothstein's involvement; however, there is no conclusive indication that the gambling syndicate's actions were directed by organized crime. In response, the National Baseball Commission was dissolved and Judge Kenesaw Mountain Landis was appointed to be the first commissioner of baseball, and given absolute control over the sport to restore its integrity.