Complex sentence: Reder initially played as a goalkeeper for several local Fall River amateur teams, including Champion Niagara and Walsh Chevrolet, who he helped reach the quarter-finals of the 1929 National Challenge Cup where they eventually lost 5-1 to Bethlehem Steel.
Split into simpler sentences: Reder initially played as a goalkeeper for several local Fall River amateur teams, including Champion Niagara and Walsh Chevrolet. In 1929, he helped the latter team reach the quarter-finals of the National Challenge Cup where they eventually lost 5-1 to Bethlehem Steel.