Posted by ESPN.com's Adam Rittenberg
Ohio State will have to get through a tough closing stretch without senior kicker Aaron Pettrey, who suffered a torn MCL in Saturday's win against New Mexico.
Pettrey, who sustained the injury on kickoff coverage, will undergo surgery today and miss the remainder of the regular season. The hope is he can be back for the Buckeyes' bowl game.
Pettrey leads the Big Ten in kick scoring (8 ppg) and did much of his best work from long range, converting six of his 13 field goals from 40 yards or longer. He also converted 28 of 29 extra-point attempts.
The place-kicking duties now fall to junior Devin Barclay, who replaced Pettrey against New Mexico State and hit on 1 of 3 field-goal attempts. Barclay faces a tough assignment Saturday afternoon at Penn State, where the weather can always be a major factor.