A Roman Catholic upbringing on the south side of Dublin's River Liffey taught him the difference between good and evil and a man called Pat Devlin, manager of Bray Wanderers, has since taught him the value of combining a choirboy image with a sweet left foot that could peel a grape. A former painter and decorator, Devlin has successfully guided Duff 's professional career from Lourdes Celtic to Blackburn, where Kenny Dalglish signed him as a 16-year-old, and from there to Stamford Bridge.