Madison Greys

[1] In the eight–team league, the charter franchises joining Madison were the Aberdeen Boosters, Huron Packers, Miller Climbers, Mitchell Kernels, Redfield Reds, Sioux Falls Soos and Wessington Springs Saints.

[6] Madison ended the 1920 season with a record of 42–50, playing under managers Ralph Works and Dave Altizer.

Joining the Madison Greys as 1921 league members were the Aberdeen Grays, Huron Packers, Mitchell Kernels, Redfield Red Sox, Sioux Falls Soos, Wahpeton-Breckenridge Twins and Watertown Cubs.

The Mitchell Kernels won their second consecutive league championship, with Madison finishing 18.5 games behind.

[14] The Madison Greys teams hosted their 1920 and 1921 minor league home games at Baughman Park.