Article Photos: Oklahoma football: Defensive linemen Jordan Phillips, Chuka Ndulue able to pressure Sooners' offense 15/59

Sterling Shepard, right, tries to break the tackle of Corey Nelson (7) during the annual Spring Football Game at Gaylord Family-Oklahoma Memorial Stadium in Norman, Okla., on Saturday, April 13, 2013. Photo by Steve Sisney, The Oklahoman