Article Photos: Oklahoma State football notebook: Clint Chelf, J.W. Walsh in same backfield new to Cowboys coach Mike Gundy 3/38

Oklahoma State's Caleb Lavey (45) celebrates with Sam Wren, top, and Larry Stephens, top right, after a 52-yard interception return for a touchdown during the OSU spring football game at Boone Pickens Stadium in Stillwater, Okla., Sat., April 20, 2013. Photo by Bryan Terry, The Oklahoman