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In page Bill Fiedler:

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Fiedler began his professional career in 1933 with the Philadelphia German-Americans in the American Soccer League, winning the 1935 league championship and the 1936 National Challenge Cup title. In the National Cup series, Fiedler scored one of the Philadelphia goals in its 2-2 away tie with the St. Louis Shamrocks.[1] At some point, he moved to Philadelphia Passon. He left the ASL in 1940.