Senior Oklahoma linebacker Corey Nelson, the team's second-leading tackler, will have surgery to repair a partially torn pectoral muscle suffered in Saturday's victory over TCU, and he probably will miss the rest of the season as a result, ESPN.com reported Sunday.
Sooners coach Bob Stoops said Nelson will have the surgery on Tuesday.
Nelson has 27 tackles this season, and he also returned an interception for a touchdown in the victory over Notre Dame earlier this season.
Oklahoma ranks No. 1 in the Big 12 in total defense heading into Saturday's game against Texas.