He was later brought back in episode ten to cover for Jason Von Flue, who suffered a cut on his forehead in practice, though Von Flue's cut was healed enough in time to fight. Marcus fought on the undercard of the finale, where he lost to Melvin Guillard. Following the series, Davis strongly considered retirement but recuperated from a shoulder injury picked up against Joe Stevenson and went back to MMA training. Davis subsequently bounced back with 11 wins, including a triumphant return to the UFC at "". In Davis' fight against Paul Taylor at UFC 75 in London, England he was knocked down by a high kick to the neck, but was able to recover, gain a dominant position, and secure an armbar as Taylor desperately scrambled to regain control. Marcus won Fight of the night as well as submission of the night for that fight. For earning the submission and fight of the night awards, he was awarded $80,000 in bonuses. His next fight was a highlight-reel knockout win against fierce rival Jess Liaudin at UFC 80 in Newcastle, England. Marcus Davis lost a very one sided unanimous decision to Mike Swick at UFC 85, ending his six fight undefeated streak in the octagon and eleven fight winning streak in MMA. He got back to winning ways with a submission victory over England's Paul Kelly at UFC 89. Davis' fought Chris Lytle at "UFC 93" on January 17, 2009. Both fighters are former boxers and had discussed a potential fight in their futures since early 2008. Lytle called out Davis at "UFC 89". He suggested that the fight take place in Ireland, where Davis had gained a substantial following due to his emphasis on his Irish roots. Leading up to the event, both fighters promised to stand and trade blows for the entire fight, rather than engage in grappling. Lytle managed to stun Davis several times, but Davis used superior footwork, counter-punching, and kicks to win a split decision. The bout shared Fight of the Night honors with the Coleman/Rua co-main event, earning Davis a $40,000 bonus. Davis fought on June 13, 2009, against up and coming striker Dan Hardy. The fight became personal when Hardy took offense to Davis defeating British-based fighters in Britain. Hardy called Davis a "fake Irishman" as well as a "Plastic Paddy" and said his website "looked like a St. Patrick's day parade had blown up". Hardy posted photos of Davis on Cagewarriors.com which resulted in many being edited in "humorous" fashions by forum users.