Rocky Calmus leads an OU defense that has forced 12 turnovers

Rocky Calmus intercepts a pass during Oklahoma's rout of Air Force

Rocky Calmus and the OU defense put the game away in the first quarter

LB Rocky Calmus is the emotional leader on Oklahoma's defense

Rocky Calmus forced the fumble that led to the game-clinching touchdown

Rocky Calmus had 17 tackles in the Sooners' 31-14 win over Nebraska last season

Rocky Calmus leads OU with 8 tackles for loss this season

Rocky Calmus and OU's linebackers must contain Nebraska's devastating option attack

Rocky Calmus returned a Chris Simms interception last week for a touchdown