Earlier this week, Junior Seau, once one of the most respected and feared defensive players in the National Football League, committed suicide. As if the news were not tragic enough, whispers began almost immediately about whether the 43-year-old Seau might have been suffering from depression and other symptoms of early onset dementia caused by the repeated blows to the head that football players endure over the course of their careers.

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Ratings for Football Helmets Help Improve Player Safety- But Not Before Another Tragedy