Diaz vs. Condit
Nick Diaz and Carlos Condit will fight for the interim welterweight belt in Georges St. Pierre's unfortunate absence.
Nelson vs. Werdum
Fabricio Werdum makes his return to UFC, having spent his time in Strikeforce since 2008. He'll match up against Roy Nelson, who is coming off a win against Mirko Filoppvic.
Koscheck vs. Pierce
Koscheck was scheduled to fight Carlos Condit, and Pierce was to fight Nick Diaz, but Pierre's injury means the two will face off against one another instead at UFC 143.
Jorgensen vs. Barao
Renan Barao hasn't been defeated in the ring since 2005. Scott Jorgensen is coming off a win against Jeff Curran at UFC 137.
Starks vs. Herman
Former Ultimate Fighter contestant Herman will take on undefeated Starks in a middleweight bout.