No. 6 Penn State brings dominant defense to Northwestern

(Photo credit: Dan Rainville / USA TODAY NETWORK)
Penn State players cling to a theory about turnovers.

So far, it has served the No. 6 Nittany Lions remarkably well.

Penn State (4-0, 2-0 Big Ten) enters Saturday's visit to conference rival Northwestern as the lone Football Bowl Subdivision program that hasn't committed a giveaway this season.

"If you drop the ball, you're cheating everybody's dreams," Nittany Lions fu