 As an amateur, he won two ABA championships, one at flyweight in 2001 and the other at bantamweight in 2004.Marsh begun his professional career in September 2004 with a win over Freddy James at the York Hall in Bethnal Green.By December 2006 he had compiled a winning ledger of 6-0 with wins over the likes of Welshman Dai Davies and French journeyman Frederic Gosset, and had earned a crack at the Southern Area featherweight championship.