As the name indicates, the league franchises were based in Indiana and Michigan.
The Indiana–Michigan League played only the 1910 season, folding on August 21, 1910.
The league only played games on Sundays.
The league permanently folded on August 21, 1910, with the Berrien Springs Grays winning the 1910 championship.
[1] The Encyclopedia of Minor league Baseball: Second Edition.