Article Photos: Big 12 appears tougher than it has ever been — if not more 30/69

An official lies across the back of OSU's James Castleman (91) after the two collided during a college football game between Oklahoma State University (OSU) and the University of Texas (UT) at Boone Pickens Stadium in Stillwater, Okla., Saturday, Sept. 29, 2012. Photo by Nate Billings, The Oklahoman