William F. Stellberger (April 22, 1865 – November 9, 1936) was an American professional baseball player who pitched in one game for the 1885 Providence Grays of the National League.

[1] He pitched his only major league game on October 1, a complete game loss to the Detroit Wolverines.

[2] Stellberger later played for several minor teams; Bridgeport of the Eastern League, Deluth of the Northwestern League, Greenville, Manistee, and Battle Creek of the Michigan State League, and the New Orleans Pelicans of the Southern Association.

[3] He died at the age of 71 in his hometown of Detroit, Michigan, and is interred at Woodmere Cemetery.

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