Article Photos: Oklahoma coach Bob Stoops confirms Trevor Knight's knee injury; Blake Bell will start Saturday against Tulsa 28/61

Oklahoma's Trey Millard (33) celebrates with David Smith (25), and Trevor Knight (9) after scoring a touchdown during a college football game between the University of Oklahoma Sooners (OU) and the West Virginia University Mountaineers at Gaylord Family-Oklahoma Memorial Stadium in Norman, Okla., on Saturday, Sept. 7, 2013. Oklahoma won 16-7. Photo by Bryan Terry, The Oklahoman