Towards the end of his career, he played for a number of non-League sides.
That's a record bettered by only one other non-league side.
They were the first non-League side to make the fifth round since 1994.
To this day that remains one of the biggest victories by a non-league side against senior opposition in the Cup.
The non-league side will be backed by almost 2,500 supporters when they make the short trip to Priestfield.
To make the number of matches up, seven non-league sides were given byes to this round.
He subsequently played for a number of non-league sides in Devon.
During his scholarship, Duffy spent a number of periods on work experience with local non-league sides.
He also appeared for a number of non-league sides during his career.
He also played with several non-league sides throughout his career, including Barnoldswick Town.