There's little debate to be had at this point as we enter Week 9 of the college football season: Wisconsin has one of the best defenses in the entire country .

Watching the Badgers swarm the Trojans, consistently overwhelming them at the line of scrimmage and harassing quarterback Jayden Maiava, the eye test backs that notion up. But so do the numbers.

USC mustered a comical -17 rushing yards. Seven points was the fewest a Lincoln Riley-coached team had scored...ever. Wisconsin notched a whopping nine tackles-for-loss.

The larger, overarching numbers back that up too. The Badgers allow the fewest yards-per-play in the country at 3.9. They have the No. 13 total defense in the nation, allowing 280.1 yards per game. They're tied for the No. 10 scoring defense in the country, allowing 15.29 points per game.

Wisconsin's defense, coached by coordinator Mike Tressel, is a well-oiled machine.…