Having turned professional as a boxer illegally aged 15, Duff retired aged 19. After working as a salesman, including selling sewing machines, Duff returned to boxing to make matches across the UK.
Duff was involved with 16 world champions and many world class British fighters, including: Frank Bruno, Joe Calzaghe, John Conteh, Terry Downes, Lloyd Honeyghan, Maurice Hope, Charlie Magri, Alan Minter, John H Stracey, Jim Watt, Howard Winstone.
Manager currently of boxer Billy J-E
- Mickey Duff with Bob Mee. Twenty & Out: a life in boxing. Collins Willow. ISBN 0-00-218926-7.
- James B. Roberts, Alexander Skutt, James B. Roberts (2006). The Boxing Register: International Boxing Hall of Fame Official Record Book. Collins. p. 709.
- Alan Hubbard (20 June 1999). "Interview: Mickey Duff - Missing link in a haul of fame". The Independent (London).
Boxing Manager of Billy James-Elliott