Freshman Randall Cobb had successful arthroscopic surgery on his left knee Tuesday, Coach Rich Brooks said.
"This will take a little longer rehabilitation than some of the cartilage repairs we've had in the past," Brooks said. "He won't practice for two-to-three weeks. I wouldn't rule him out, but he looks to be doubtful to play in the bowl game."
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Cobb, who sustained the injury during Saturday's game at Tennessee, has started the last four games at quarterback. At wide receiver, he has caught 21 passes for 197 yards and two touchdowns. He has also returned punts, averaging 8.4 yards a return.
Sophomore Mike Hartline is expected to return to the No. 1 quarterback position in Cobb's absence.
Hartline started the first eight games of the season. He has passed for 1,462 yards and eight touchdowns this year.