He scored the only goal for Charlton Athletic in extra time in the 1947 FA Cup Final, against Burnley.
[3] Duffy, a fast and intelligent winger, first came to Charlton Athletic as a war time guest player.
A modest fee of £330 persuaded his home club, Leith Athletic[2] to relinquish his services when he was demobilised from the armed forces.
He aided Charlton against Chelsea in the 1944 "South" Final and against Derby County the following year.
This biographical article related to association football in Scotland, about a midfielder born in the 1910s, is a stub.