http://en.wikipedia.org/wiki/Bill_Callahan...otball_coach%29
Bill Callahan (born July 31, 1956, in Chicago, Illinois), is the former head coach of the University of Nebraska football team. He was named head coach of the Cornhuskers in 2004. He was fired November 23rd, 2007. Callahan was formerly the head coach of the Oakland Raiders in the National Football League.