User:Ethan.R.G.Watson/sandbox

Many athletes at some point in their life will experience an injury that might put a set back on their career or season. Each sport has their own different injuries that can occur. The NFL has a big problem with players getting concussions. Most players in the NFL.

It was a finding heard around the sports world. Researchers at Boston University announced in July that they had detected evidence of chronic traumatic encephalopathy (CTE) in 110 donated brains of former NFL players. They had studied 111. The result suffered from selection bias—the brains had been donated because those men had demonstrated symptoms of the degenerative brain disease—but the report’s ironclad takeaway is that the illness is far more prevalent in pro football players, subject to years of repeated hits to the head, than in the general public. The unavoidable conclusion: Football’s concussion problem is far worse than originally thought.