Oklahoma coach Bob Stoops confirms Trevor Knight's knee injury; Blake Bell will start Saturday against Tulsa - Article Photos 16/61

Oklahoma's Brennan Clay (24) slides down as West Virginia's Karl Joseph (8) collide with West Virginia's Doug Rigg (47) 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. Rigg was injured on the play. Oklahoma won 16-7. Photo by Bryan Terry, The Oklahoman