 He then followed up this strong performance with a 1st-round KO win over Clifton Brown of Canada, winning his first WMC World Title.On 26 June 2005 at Xplosion 10 event in Australia, Corbett won his second WMC World Title over Russian fighter Magomed Magomedov.At 3rd MARS World Fighting GP in Chiba, Japan in 2006 he suffered his first KO loss of his career against American Heavyweight Alex Roberts.