Article Photos: Oklahoma football: Sooners' secondary shaky without Aaron Colvin, Gabe Lynn 77/99

Oklahoma's Sterling Shepard (3) and Tulsa's Dwight Dobbins (9) fight for a pass during 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