Last year after Week 4 the Kansas city chiefs defence ranked dead last in the NFL in yards allowed per rush (5.73). after the season chiefs head coach andy reid cleaned house and hired a whole new group of defensive coaches, changing from a base 3-4 to a 4-3 system. Player-wise, reid and GM brett Veach retooled the front-seven and secondary accordingly — shipping out players who didn’t fit, and bringing in those who did. result? after Week 4 this year, the chiefs defence ranks dead last in the NFL in yards allowed per rush (5.87). even worse.