Lambert’s departure comes after he had sustained three consecutive losses while inside the Octagon. His most recent defeat took place at UFC 88 in September, where he was submitted in the second round by Jason MacDonald in his debut as a middleweight.
Prior to UFC 88, Lambert had competed as a light heavyweight and began his UFC career with a 3-0 record with victories against Rob MacDonald, Terry Martin, and Branden Lee Hinkle. His most notable win took place at UFC 68 in March of 2007 during that preceded Randy Couture’s upset unanimous decision victory over Tim Sylvia. Facing Renato “Babalu” Sobral, Lambert scored an upset of his own following a knockout punch delivered at 3:26 of round 2.