In 2015, as Michigan State was in the midst of winning its second Big Ten championship in three years and eventually reaching the College Football Playoffs, it was, as had become typical, relying on one of the best defenses in the country. Defensive coordinator Pat Narduzzi left in the previous offseason to become the head coach at Pittsburgh, the attacking style of play continued and the Spartans excelled at pressuring the quarterback. They had 37 sacks that season after piling up 42 in 2014. But by the time the 2016 season began, there had been changes that went much further than who was calling the shots.
Source: Detroit News