In 1920, Miller played as charter members of the Class D level South Dakota League, finishing in last place while hosting home minor league games at Crystal Park.
In 1920, Miller, South Dakota first hosted minor league baseball when the "Miller Climbers" began play as charter members of the eight–team, Class D level South Dakota League.
The Aberdeen Boosters, Huron Packers, Madison Greys, Mitchell Kernels, Redfield Reds, Sioux Falls Soos and Wessington Springs Saints teams joined Miller in beginning play as charter members of the South Dakota League.
Miller ended the 1920 season with a record of 30–64, playing under managers Showboat Fisher and Frank Gurney and ending the season in eighth place.
[9] The Miller Climbers hosted home minor league games at Crystal Park.