Michael Joseph "King" Kelly, also commonly known as "$10,000 Kelly", was an American outfielder, catcher, and manager in various professional American baseball leagues including the National League, International Association, Players' League, and the American Association. He spent the majority of his 16-season playing career with the Chicago White Stockings and the Boston Beaneaters. Kelly was a player-manager three times in his career – in 1887 for the Beaneaters, in 1890 leading the Boston Reds to the pennant in the only season of the Players' League's existence, and in 1891 for the Cincinnati Kelly's Killers – before his retirement in 1893. He is also often credited with helping to popularize various strategies as a player such as the hit and run, the hook slide, and the catcher's practice of backing up first base.

The following is a franchise history of the Chicago Cubs of Major League Baseball, a charter member of the National League who started play in the National Association in 1870 as the Chicago White Stockings. The Chicago National League Ball Club is the only franchise to play continuously in the same city since the formation of the National League in 1876. They are the earliest formed active professional sports club in North America, predating the team now known as the Atlanta Braves by one year. In their early history, they were called in the press the White Stockings, Orphans, Infants, Remnants and Colts before officially becoming "Cubs" in 1907.