Only the guys with gray hair and those who have lost their hair can remember when the Dallas Cowboys were great. It has been more than 30 years since the Cowboys won the Super Bowl, and I’m old enough to vividly recall that night on January 28, 1996, when owner Jerry Jones celebrated the third title in four years for “America’s Team.” Jones was driving the Cadillac of NFL franchises — before falling asleep at the wheel and steering it into a ditch.