After the Switzer - led Cowboys won Super Bowl XXX , a dynasty with so much long - term promise fizzled away .
In 1994 , Johnson was replaced by another college coaching legend , Barry Switzer , who had led Oklahoma to three national championships .
After the Barry Switzer - led Cowboys won Super Bowl XXX , a dynasty with so much long - term promise fizzled away .
In 1994 , Johnson was replaced by another college coaching legend , Barry Switzer , who had led Oklahoma to three national championships .