Article Photos: Oklahoma football: Defensive tackle Casey Walker returns to practice 1/70

Oklahoma's Casey Walker (53) during the college football game between the University of Oklahoma Sooners (OU) and the University of Kansas Jayhawks (KU) on Saturday, Oct. 15 2011. in Lawrence, Kan. Photo by Chris Landsberger, The Oklahoman  ORG XMIT: KOD