Barrett lost to former cruiserweight champion David Haye (who was also the promoter of the fight) on November 15, 2008, at the O2 arena in London, by knockout at 1:28 fifth round,  after being put down five times in the fight.
Barrett lost to David Haye, who was also his promoter, in a boxing match on November 15, 2008, at the O2 Arena in London. The fight ended with Haye winning by knockout in the fifth round after Barrett had been knocked down five times.