The Keystone Association was a five–team independent level baseball minor league that played in the 1884 and 1885 seasons.
The Keystone Association featured franchises based exclusively in Pennsylvania.
The Keystone Association formed as Independent level minor league in 1884.
The Keystone Association was formed at a March 3, 1884 meeting in Lancaster, Pennsylvania.
[4][5][6][7] After the Keystone Association folded, York and Lancaster continued play, as the York White Roses and Lancaster Ironsides became members of the Eastern League for the remainder of the 1884 season.