Previously, Skupien had managed the Rayson Sporting Goods, a Chicago baseball team, and also had served as a scout for the AAGPBL since the early years of the circuit.

He reported to the board of directors in 1949 and later managed during four years, leading his teams to three playoff appearances, including the Championship title in the league's last season.

In the playoffs, Kalamazoo defeated the South Bend Blue Sox in three games, and later disposed of the strong Daisies (3-2) to clinch the last Championship title in the league's history.

[4][7][8][9] In addition to his work as a skipper, from 1949 to 1950 Skupien was kept busy as a general manager for the Chicago Colleens and Springfield Sallies touring teams.

[8][10] Mitch Skupien is part of the AAGPBL permanent display at the Baseball Hall of Fame and Museum at Cooperstown, New York, opened in 1988, which is dedicated to the entire league rather than any individual figure.