What’s interesting about Joe Barry’s stint in Detroit is that in 2006 the lions were 30th in points against. Then 32nd in 2007 and 2008 with Joe Barry. And then 32nd again the year after he left.
It’s almost like the talent was the constant in those lions teams considering 3 defensive coordinators all finished as one of the worst 3 teams in a span of 4 years. And let’s not forget that Rod Marinelli was the head coach and the leader of the defense. He was a highly successful DC in his time in the league so maybe talent does play a role?