In recent times, the NFL may have finally begun to treat the issue of concussion with the respect it deserves.
But that doesn't mean the players currently playing the game don't continue to suffer the damaging brain injuries.
And, hearing Buffalo Bills running back Karlos Williams describe his month since suffering a concussion against the New York Giants really puts into perspective just how scary the issue is.
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The rookie, who finally emerged from the NFL's concussion protocol this week, revealed how the initial symptoms included; throwing up, dizzyness and headaches.
Williams, after realising it was more than dehydration, couldn't even drive himself back to the Bills facility after the game such was the pain - his fiancee had to take him.
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And, over the next four weeks, things didn't get much easier:
"Having really bad headaches. Not being able to sleep. Not being able to eat. Kind of side effects I've had over the years from having concussions: just being very, very groggy," was how he described the feeling.
"Wanting to be up. Wanting to watch things. [But your] eyes hurt real, real bad. Very sensitive to light. Things like that.
"You're always tired. You can't sleep. Your head's always kind of pounding, throbbing. Your head feels tight."
And, as if that wasn't enough, he effectively lived in darkness for one week after the concussion was diagnosed with his partner ensuring he was kept away from sunlight, artificial light and television.
The Buffalo star, a full participant in practice this week, is now back contention to return to the gridiron this weekend.
You might think, having suffered three concussions already in his short football career, Williams would be taking some precaution moving forward. Not so:
"It's not going to change the way I run the football. It hasn't changed the way I run the football. I run the football with attitude, and I think that's what the coaches expect from me coming back."
In fact, while his description of what sounds like a horrible few weeks is scary, his defiant response may actually be more concerning - especially considering the severe long-term issues now associated with concussions.
NFL fans: How can players be better protected from head injury, or is the focus taking away from the game? Have your say in the comments below...