Bill Fiedler played midfield for the US and in the American Soccer League (ASL) for seven seasons. He was named to the US team for the 1934 World Cup, but did not play. He played at the 1936 Olympics in the US loss to Italy, 1-0, and in 1935, he had appeared in a friendly against Scotland. In the ASL Fiedler played for the Philadelphia German-Americans, beginning in 1933, and helped them win the 1935 ASL title and the 1936 National Challenge Cup. He later played with the Philadelphia Passion and retired in 1940.