Article Photos: Heisman Trophy winner Johnny Manziel will predictably be unpredictable 8/17

Oklahoma head coach Bob Stoops walks the sideline during practice after media day for the Cotton Bowl NCAA college football game at Cowboys Stadium, Sunday, Dec. 30, 2012, in Arlington, Texas. Oklahoma is scheduled to play Texas A&M on Jan. 4, 2013. (AP Photo/LM Otero) ORG XMIT: TXMO110