White did not specify Pettis’ injury, but said Pettis has
spent the last two days in Las Vegas, seeing Dr. Steven Sanders, an
orthopedist at Bone & Joint Specialists. After examining
Pettis, Sanders informed him that no surgery would be necessary to
address his problem.
The charismatic and popular 26-year-old champion is 17-2. The
UFC On FOX 9 would mark his first attempted title defense. Former
Strikeforce titleholder Thomson was moved into the slot after true
top contender T.J. Grant was ruled out due to lingering
concussion-related issues. Thomson knocked out Nate Diaz in his UFC
debut in April.