His early career as a professional lightweight was not very notable, but after a year out from boxing caused by an eye injury, he returned fitter and lighter as a super featherweight.
He came to note to the wider public when, as an amateur, he was selected to fight for Wales in the 1986 Commonwealth Games after beating Tony Feliciello in the Welsh National Championships.
[1] Fighting in the lightweight division (60 kg) Haddock progressed to the final, where he took the silver medal after losing to Canadian Asif Dar.
[3] A month later Haddock picked up a win, when he stopped Mark Ramsey through a technical knockout, in an undercard encounter at the Town Hall in Birmingham.
Haddock defeated Kelley in a six-round bout by points, exactly a year and a day after his loss to Robinson at the same venue, the Star Leisure Centre in Cardiff.
[3] At the end of 1992, Haddock beat Harry Escott, before successfully defending his British title against Steve Walker in July 1993, another technical knockout, this time in round seven.
Fought at the Cardiff Arms Park, the match was the main undercard bout for the Lennox Lewis vs. Frank Bruno encounter.
Haddock is one of only four Welshmen to have won the British super-featherweight title, alongside Robert Dickie, Floyd Harvard and Gary Buckland.