There is no clear information on when he signed with Bethlehem but his first game was an exhibition match against the University of Pennsylvania on April 12, 1915.
From 1915 to 1919, he played in five consecutive National Challenge Cup finals as Bethlehem Steel won four, losing only the 1917 title game to the Fall River Rovers.
[7] In the first few years of Ferguson's time with Bethlehem, the team competed in various amateur Pennsylvania leagues.
While he continued to play sporadically, filling in when Bethlehem had injuries to its backline, until his retirement in 1928 at the age of forty-two, he spent most of his time as the team's trainer.
[9] During his second stint with Bethlehem, he traded playing time with his younger brother, Davey Ferguson.