text:  On January 11 , 2011 , <unk> was announced as a coach of The Ultimate Fighter Season 13 , opposite Junior dos Santos , with the two expected to fight on June 11 at <unk> 131 , however , he was struck with another bout of <unk> and had to withdraw from the fight on May 12 . He was replaced by Shane <unk> , who ended up losing against dos Santos . <unk> underwent surgery on May 27 to help battle his problems with <unk> . Dana White said that he had a 12 @-@ inch piece of his <unk> removed . 
  