The 1936 National Challenge Cup was the annual open cup held by the United States Football Association now known as the Lamar Hunt U.S. Open Cup. This edition featured the fifth of six consecutive final appearances for Alex McNab's team. The Shamrocks not participating in their local league that year were playing inter city matches with top competition primarily from Cleveland, Chicago and Detroit. One of their only losses during the season was to Heidelberg, eventual Western Final opponents of the Shamrocks. Early in the season Heidelberg took the first game of a three-game set, the second match ended in a draw and McNab's men evened up the series by pulling out a victory in the third game. Both teams eventually made their way to the Western Final, Heidelberg led by the lone scorer for th