I think the concussion issue is two fold. Past playerd had less technology in thr helmets and went back into games which caused a lot of the serious injuries afterwards. Secondly current players with the new helmets are not wearing equipment that fits properly. Way to often do you see a players helmet fly off after a hit. The helmet should be so tight that it makes a mark on your forehead to help your head from jarring in the helmet. Also the chipstraps are way to lose. You shouldn't be able to easily slide your helmet on and off, if you can it us too lose.