NS.. ex-NFL players sue league... It's starting to make sense now
The way I hear it, the rules "of old" made the players PROVE that football caused the mental and head problems that occurred down the road. Hard if not impossible.
New Collective Agreement removes the factor of proof. In other words, no proof required anymore for the players to get help and treatment down the road. That's why all the new "protections" have been put in place.