I hate to quote Peter King again, but as you'll read, this item actually comes from The Football Outsiders, whom I deeply respect as football analysts. King's item 5.b. of "Ten Things I Think I Think" clearly focuses on my biggest worry about Pendergast running our defense: susceptibility to shotgun/spread offenses.
This topic has been addressed before on AP, but I believe a refresher is in order. It is more likely than not that we will continue to see the proliferation of spread-style offenses in the NFL in the immediate future. Pendergast left one bottom-15 pass defense to run bottom-5 pass defense that set the record for the fewest total sacks in a season. Further compounding the problems: there is no Adrian Wilson in the Chiefs' defensive backfield.
I'm as happy as anyone about this offseason, but I'm going to have a microscope on Pendergast. His track record leaves much to be desired.