Article Photos: Oklahoma football: Casey Walker said absence for 'personal issues' is in the past 3/5

Oklahoma's Casey Walker (53) puts pressure on Texas Tech's Seth Doege (7) during a college football game between the University of Oklahoma (OU) and Texas Tech University at Jones AT&T Stadium in Lubbock, Texas, Saturday, Oct. 6, 2012. Oklahoma won 41-20. Photo by Bryan Terry, The Oklahoman