Sergio Pettis, the 20-year-old brother of UFC lightweight champion Anthony Pettis, will need a new opponent for his UFC 167 debut.
Vaughan Lee suffered an injury and was forced off the November 16 card from Las Vegas. UFC officials made the announcement on Thursday.
Pettis (9-0) has finished each of his last two opponents inside of the first round. He owns three career knockout finishes and three submission stops.
No word yet on who will replace Lee.