Sooners' Gresham to have arthroscopic knee surgery

NORMAN, Okla. (AP) - Oklahoma tight end Jermaine Gresham will have arthroscopic surgery to determine the extent of damage to his injured right knee.

Coach Bob Stoops said Tuesday that it's unknown whether Gresham will be able to return this season. Stoops says MRIs did not reveal the extent of the damage, and he could be sidelined anywhere from two weeks to a year.

The No. 13 Sooners are already reeling from the loss of Heisman Trophy-winning quarterback Sam Bradford, who sprained his shoulder in a 14-13 loss to BYU and will be out at least two weeks.

Gresham was a second-team All-America pick last season and had been considered a top NFL prospect before returning for his junior year.