While the NFL did try and bury some of information regarding concussions, it's pretty tough for NFL players to pull the babe in the woods routine and pretend they had no idea that there was a risk of head injuries and concussions.
Players have been trying experimental helmets for a long time with exterior shells to absorb the hit and protect their head, going back to the 80s and 90s with Mark Kelso and Steve Wallace. Riddell came out with their Revolution helmet in 2001 and there have been several improvements since then.
It's true that the history of injuries sustained and how they affect later years is well known. Players expect to have premature arthritis and degenerative joint disease, often requiring joint replacement; they've accepted that risk.
And many players retire a bit earlier than they had planned, just assessing their burden of injuries and deciding at a point in time to stop the level of debility where it is.
But none knew the connection to degenerative brain disease, the horrors experienced by so many of the cases like Seau and Webster.
This is not just normal or premature aging; these guys can't just sit in the rocking chair and enjoy their grandkids.
The misery they experience destroys them and their families. A glorious career is ruined in anguish and shame.
While helmet manufacturers have made advancements in internal padding and the physics of impact absorption and dispersion (see Xenith), none have instituted external crush zones or impact-absorbing material
outside the helmet shell.
The NFL really didn't want to acknowledge this connection because it opens a new area of liability.
Further research needs to be done to identify those at-risk individuals, and the league should pay for that.
Of course, this must be done objectively and independently -- not directly supervised by the league.
One might hypothesize that CTE arises in association with concussions and adrenergic steroid use or tobacco use.
Maybe unexpected protectors such as heavy milk consumption or adequate sleep will come to light.
There is still much to be understood about CTE.
But it's time to stop the denial and foot-dragging, and get into the business of saving our game and its athletes.