Serious brain damage can occur without concussions: Chronic Traumatic Encephalopathy is a degenerative disease found in the brains of people with a history of repetitive brain trauma including asymptomatic subconcussive hits that do not cause symptoms. https://www.bu.edu/cte/about/frequently-asked-questions/ …
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Reframe that as concussions per player per hour of play averaged over the league. This compare that to industrial accidents using the same metric for people who get paid a lot less money.
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