Head coach Andy Reid took a lot of criticism for promoting Castillo to lead the defense. After all, the majority of his experience in the NFL has been coaching the offensive line. However, Reid defends the move because of all the conversations that he heard between Castillo and the team's legendary former defensive coordinator Jim Johnson. Reid felt that Castillo would be able to attack offensive lines with a variety of blitzes never seen before.

Then, for some odd reason, Reid decided to handcuff Castillo with a defensive line coach who isn't suited to Castillo's system.