[1] A total of 13 teams competed in the league, though several joined the original 8-team lineup after its April 28 start and several folded before its September 10 close.
[2][3] It was a racially integrated league that included two African American teams, the Cuban Giants and New York Gorhams.
[2] The Middle States League began play on April 28, 1889, and ended the season on September 10, 1889.
Norwalk entered the Middle States League on June 12 and disbanded July 3.
The Norristown team entered the Middle States League on June 20 and disbanded August 21.