Welcome to my world: Oklahoma's Casey Walker says he's growing up - Article Photos 1/3

Casey Walker (53) and Chuka Ndulue (98) stop Collin Klein (7) after a short gain during a college football game between the University of Oklahoma Sooners (OU) and the Kansas State University Wildcats (KSU) at Gaylord Family-Oklahoma Memorial Stadium, Saturday, September 22, 2012. Photo by Steve Sisney, The Oklahoman