Last month, 75 ex-football players filed suit the National Football League seeking unspecified amounts of damages for head injuries sustained over their careers. In the lawsuit, the players allege that the NFL knew of the harmful effects of multiple concussions as early as the 1920s, but kept that information from players until 2010. Riddell, the helmet maker, is also named in the lawsuit as a defendant.

As explained in this ESPN article, the players contend that the NFL knowingly withheld that information from them, to their detriment...

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