A heavyweight bout slated for the UFC 153 preliminary card is off now as Geronimo Dos Santos is injured and out of his bout against Gabriel Gonzaga. There is no word yet on who may be replacing Dos Santos, or if Gonzaga with remain on the card in any fashion. Gonzaga is currently undefeated in his second UFC run, defeating Ednaldo Oliveira by submission at UFC 142. UFC 153 takes place on October 13th at the HSBC Arena in Rio De Janeiro, Brazil with Anderson Silva and Stephan Bonnar headlining.