Article Photos: Oklahoma State football: Blake Jackson now strictly an inside receiver

OKLAHOMA STATE UNIVERSITY / OSU / COLLEGE FOOTBALL: OSU's Clint Chelf throws a pass during Oklahoma State's spring football game at Boone Pickens Stadium in Stillwater, Okla., Saturday, April 21, 2012. Photo by Bryan Terry, The Oklahoman

OKLAHOMA STATE UNIVERSITY / OSU / COLLEGE FOOTBALL: OSU's Clint Chelf throws a pass during Oklahoma State's spring football game at Boone Pickens Stadium in Stillwater, Okla., Saturday, April 21, 2012. Photo by Bryan Terry, The Oklahoman