What's the record of those teams?Thats a false statement. There are currently 6 teams in the BIG below Nebraska in scoring defense. The teams above Nebraska have one thing in common, with the exception of Indiana, that is they avoided Ohio St and didn't get 50 hung on them too.
Nebraska has a long way to go on defense, but take away Ohio St and Illinois (5 turnovers) and the D has put Nebraska in position to win every game. The offense, on the other hand, is flat out garbage.