Steve Spagnuolo described defense as ‘relentless and physical’ vs. Cardinals

Kansas City held Arizona to under 300 yards — and the Cardinals scored just seven points through three quarters of play. The Kansas City Chiefs completely dominated their Week 1 game against the Arizona Cardinals, winning by a 23-point margin. As quarterback Patrick Mahomes threw for five touchdowns (and the offense exploded for 44 points), the defense held the Cardinals…