Article Photos: Oklahoma football notebook: Lane Johnson, Bronson Irwin provide latest O-line scares 5/47

Oklahoma's Justin Brown (19) leaps over Iowa State's Cliff Stokes (7) during a college football game between the University of Oklahoma (OU) and Iowa State University (ISU) at Jack Trice Stadium in Ames, Iowa, Saturday, Nov. 3, 2012. Photo by Bryan Terry, The Oklahoman