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

ESPN's Kirk Herbstreit films a segement for the College GameDay on the University of Texas campus at Austin, Friday, Aug. 26, 2011, in Austin, Texas. ESPN and Texas announced a $300-million, 20-year deal in January to create and launch the Longhorn Network, a 24-hour channel dedicated to Longhorns sports. The network will broadcast the Texas football season-opener Sept. 3 against Rice. (AP Photo/Austin American-Statesman, Ricardo B. Brazziell) ORG XMIT: TXAUS207