Article Photos: Oklahoma football: Sooner defense's next test is toughest 6/7

CELEBRATION: Oklahoma State's Clint Chelf (10) and Oklahoma State's Parker Graham (71) celebrate a Cowboy touchdown during a college football game between Oklahoma State University and the Texas Tech University (TTU) at Boone Pickens Stadium in Stillwater, Okla., Saturday, Nov. 17, 2012. Photo by Sarah Phipps, The Oklahoman