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Corey Nelson out for season

Oklahoma linebacker Corey Nelson will undergo surgery to repair a partially torn pectoral muscle, which will likely force him to miss the rest of his senior season.

Nelson, a defensive captain, suffered the injury Saturday in Oklahoma's 20-17 win over TCU. Coach Bob Stoops said the procedure would take place Tuesday.

Nelson's 27 tackles are second-most on the Sooners, who play Texas on Saturday. Nelson also returned an interception for a touchdown on the opening series of Oklahoma's win at Notre Dame two weeks ago.

The Sooners, who struggled defensively last season, currently have the No. 1 defense in the Big 12.