Article Photos: Oklahoma football: Sooners' secondary shaky without Aaron Colvin, Gabe Lynn 81/99

Oklahoma's Sterling Shepard (3) makes a long pass reception during the first half of a college football game between the University of Oklahoma Sooners (OU) and the Tulsa Golden Hurricane (TU) at Gaylord Family-Oklahoma Memorial Stadium in Norman, Okla., on Saturday, Sept. 14, 2013. Photo by Steve Sisney, The Oklahoman