 Koscheck was expected to face Carlos Condit on February 4, 2012 at UFC 143.However, on December 7, 2011, it was revealed Georges St-Pierre had sustained ACL injury to his left knee and the injury would sideline him for around ten months, forcing him out of his scheduled bout with Nick Diaz.Condit and Diaz faced each other at the event with the winner crowned interim UFC Welterweight Champion, while Koscheck faced Mike Pierce at the event.