Dallas Cowboys defensive coordinator Monte Kiffin gestures as he responds to a question during an NFL football news conference at the Cowboys training facility Thursday, Feb. 14, 2013, in Irving, Texas. Kiffin is about to turn 73 and has been out of the NFL for five years. The Cowboys are thinking more about his history of success at Tampa Bay and how a switch to Kiffin's 4-3 alignment will translate into fewer mistakes and more turnovers. (AP Photo/Tony Gutierrez)

Dallas Cowboys defensive coordinator Monte Kiffin listens to a reporter's question during an NFL football news conference at the team's training facility Thursday, Feb. 14, 2013, in Irving, Texas. Kiffin is about to turn 73 and has been out of the NFL for five years. The Cowboys are thinking more about his history of success at Tampa Bay and how a switch to Kiffin's 4-3 alignment will translate into fewer mistakes and more turnovers. (AP Photo/Tony Gutierrez)

Dallas Cowboys defensive line coach Rod Marinelli smiles as he listens to a question during an NFL news conference at the Cowboys training facility Thursday, Feb. 14, 2013, in Irving, Texas. (AP Photo/Tony Gutierrez)