The NFL can be weird at times. A 15-1 team that brought back practically its entire coaching staff and most of its roster is 1-3 this season. And 1-4 is a grim possibility. Not every NFL season is going to be the same, and whatever you did last season isn’t guaranteed to carry over. Still, the Panthers’ dip is startling. They cut loose All-Pro cornerback Josh Norman for reasons that still make no sense, but they did get back receiver Kelvin Benjamin from a torn ACL.