FiveOuncesOfPain.com have confirmed that undefeated light heavyweight Thiago Silva is no longer expected to fight Lyoto Machida at UFC 89 on October 18 due to a back injury. The UFC has yet to confirm Silva’s departure from the card but an official announcement is believed to be forthcoming.
It is not known if the UFC was able to immediately secure a new opponent for Machida, as the promotion has had trouble in the past finding willing opponents.