There has been a recent emphasis in high school football placed on leverage or rugby-style tackling after so many problems with concussions have come up in recent years

There was a time not all that long ago when prep football coaches were heard on the sideline yelling “stick your helmet in his gut!” or something similar. Not anymore.

The NFL’s emphasis on tackling with the shoulders, instead of the head, isn’t just about player safety. According to the coach of the best defense in football, it’s also the most effective way to bring a ball carrier down.