Article Photos: Oklahoma coach Bob Stoops confirms Trevor Knight's knee injury; Blake Bell will start Saturday against Tulsa 51/61

Quentin Hayes (10)  and Cortez Johnson (22) knock the ball from runner Kevin White (11) allowing Gabe Lynn (9)  to pick up the fumble during the second half of 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. Photo by Steve Sisney, The Oklahoman