Prizefighter series
Baker made his professional debut on 6 September 2003, stopping Dave Clarke in the first round. The highlight of Baker's career was competing in the heavyweight edition of the Prizefighter series on 2 October 2009. He entered the tournament as an outsider, but defeated one of the favourites—Danny Williams—by unanimous decision (UD) in the opening round, while also scoring two knockdowns against Williams in the first round of their fight. In the semi-final, Baker was eliminated after losing a UD to Coleman Barrett.