Under OVW's new booker, Paul Heyman, Anthony Carelli adopted the gimmick of Boris Alexiev, a Russian shootfighter/mixed martial artist. On October 29, he lost his debut OVW match, teaming with Aaron Stevens against Chet the Jet and Chris Cage. Alexiev made his TV debut on April 12, 2006, managed by his "comrade", Mr. Strongko and defeating Mo Sexton. He was booked to dominate opponents with stiff strikes and submission style wrestling. He had a 10-second win over a wrestler named Dewey. He signed a developmental contract with WWE on August 11, 2006, and continued training in OVW.