Tennessee quarterback Justin Worley is out indefinitely after having surgery on his right thumb.
Butch Jones confirmed the surgery following the Volunteers' practice Tuesday evening.
"He'll be out an indefinite period of time," Jones said. "Everything is how the body heals. It could be two weeks. It could be three weeks. It could be four weeks. We'll see how he progresses."
Worley's is the second injury to a Tennessee quarterback this season. Redshirt Freshman Nathan Peterman has missed four games since undergoing hand surgery following a 31-17 loss to Florida.
With Worley out, the Volunteers will turn to freshman quarterback Joshua Dobbs. Dobbs will make his first career start on Saturday against No. 10 Missouri.
He replaced Worley in the second half of Saturday's game against Alabama. Dobbs went 5 of 12 for 75 yards and rushed for 19 yards on three carries.