It looked like his system of coaching defense was no longer stopping Big Ten offenses. They figured it out in other word's. Perfect example was the Purdue game when they had one of the worst offenses in the nation coming into the game and ended up with 49 points and over 600 yards in total offense. I am sure P,J, was less than pleased with Rossi after that game. I am surprised Michiggna St hired him after the way he coached in 2023.