Michael Joseph Kelley (December 2, 1875 – June 6, 1955) was an American Major League Baseball first baseman.

He then forged a 30-year career as a manager in the minor leagues and became a legendary figure in the "Twin Cities" of Minneapolis–St.

Many Louisville players were acquired by the surviving Pittsburgh Pirates, but Kelley returned to the minors.

[1] By 1901, he was managing Des Moines in the Western League, and the following season he was named pilot of the St. Paul Saints of the American Association, where he won back-to-back pennants in 1903–1904.

After a sixth-place finish in '31, he retired to the club presidency, operating the Millers until he sold them to the New York Giants in 1946.