The first team he is recorded as playing with is the Valley Boys, of an unknown league, in 1914.
He then played for Babcock & Wilcox, West Hudson A.A. and Philadelphia Merchant Ship, all of the National Association Football League (NAFBL).
[1] In March 1918, he was with West Hudson A.A.[2] In 1921, the American Soccer League replaced the NAFBL.
Duggan signed with the New York Field Club of the ASL and spent one season with them before bouncing from one team to another.
According to the National Soccer Hall of Fame, he also played for Newark Portuguese.