Article Photos: Oklahoma football notebook: Lane Johnson, Bronson Irwin provide latest O-line scares 6/47

Oklahoma's Kenny Stills (4) catches a touchdown pass against Iowa State's Jeremy Reeves (5) in the second quarter 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 Nate Billings, The Oklahoman