If chuck isnt in 100 percent he could easily cancel the fight. He has done so much for the UFC/they love him so much that he could do that without rubbing anyone the wrong way. Since this is his rematch I expect him to come in better shape then ever and if he isnt I would have thought that the fight would be called off.
Kind of off topic but was silva really injuired at 67? and he couldnt pull out of the fight becuase GSP already pulled out?