Even if the NFL did suppress the research, so what? Why is it the NFL's job to educate the players on head contact and concussions? Is the NFL requires to educate players on concussions before they enter the league? They are adult, why can't they do their own research? When did it become the NFLs job to provide players with this information? Second, players are being paid millions and know the risks. Don't bitch and moan if you wind up with a few concussions.
On the other hand, it becomes a problem if the NFL is allowing people to play with a head concussion. Then again, if an adult wants to play with a concussion, shouldn't it be their right? Or should the NFL step in and disallow them to play? Hmmmm.