Article Photos: Oklahoma football notebook: Sooner defense comes alive in the fourth quarter 65/103

Oklahoma State's Clint Chelf (10) throw the ball during the Bedlam college football game between the University of Oklahoma Sooners (OU) and the Oklahoma State University Cowboys (OSU) at Gaylord Family-Oklahoma Memorial Stadium in Norman, Okla., Saturday, Nov. 24, 2012. OU won 51-48 in overtime. Photo by Sarah Phipps, The Oklahoman