Never coached as a DC at the P5 level. His teams generally give up 22 - 26 ppg while playing in the MAC. Nothing to write home about that I see. Yeah, he did well at Mount Union years ago. Has it translated as he’s stepped up in competition? No.
Purdue can and should expect better than this in the future. People whine about Ron English on here yet his defense is outperforming VK’s, albeit against much better competition. Brad Lambert’s defense gave up last year about what English’s is this year. Yet Knuckleheads thought he was irreplaceable.