About three or four years ago, college football formally implemented a targeting (helmet to helmet contact) rule that had immediate impact on the way tackling i

About three or four years ago, college football formally implemented a targeting (helmet to helmet contact) rule that had immediate impact on the way tackling is taught in college and high school. Players are now taught to tackle shoulder first in certain situations or go for the legs in others. Pros have a looser, inconsistently applied, personal foul rule, but we're starting to see the techniques taught at lower levels in the pros. Mind you, it's still an incredibly violent game, who knows if the new measures will make a difference, and we'll probably see shorter careers due to leg injuries.