The Cleveland Spiders were an American professional baseball team based in Cleveland, Ohio. The team competed at the major league level from 1887 to 1899, first for two seasons as a member of the now-defunct American Association (AA), followed by eleven seasons in the National League (NL). Early names for the team included the Forest Citys and Blues. The name Spiders itself emerged early in the team's inaugural NL season of 1889, owing to new black-and-gray uniforms and the skinny, long-limbed look of many players. National League Park served as the team's home for its first four seasons until the opening of League Park in 1891.

The American Association of Base Ball Clubs (AA) was a professional baseball league that existed for 10 seasons from 1882 to 1891. Together with the National League (NL), founded in 1876, the AA participated in an early version of the World Series seven times versus the champion of the NL in an interleague championship playoff tournament. At the end of its run, several AA franchises joined the NL. After 1891, the NL existed alone, with each season's champions being awarded the Temple Cup (1894–1897).