An unspecified injury has forced heavyweight Shane Del Rosario to withdraw from UFC 162. As a result, Gabriel Gonzaga has stepped in to fill the void and face Dave Herman at the July 6 event.
The UFC announced the changes late on Friday night.
Gonzaga will have about five weeks to prepare for Herman.
The fight is likely a pivotal one for the UFC career of Herman, who has lost three straight and is also coming off a suspension for a failed drug test that flagged him for marijuana usage.
Herman (21-5) has been finished in three straight fights. He was most recently submitted by Antonio Rodrigo Nogueira at UFC 153. Prior to that he suffered a knockout loss at the hands of Roy Nelson, and another TKO via Stefan Struve. His only UFC win was a Fight of the Night knockout over John Olav Einemo in June 2011.
Gonzaga (14-7) is seven weeks removed from a knockout loss to Travis Browne at The Ultimate Fighter 17 Finale, a defeat that snapped a three-fight win streak. He was just removed from a mandatory medical suspension on Wednesday.
UFC 162 takes place at the MGM Grand Garden Arena in Las Vegas, and will be headlined by a middleweight title match pitting Anderson Silva against challenger Chris Weidman.