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17 mayo 2015 año - Chris Borland retires

Descripción:

49ers linebacker Chris Borland retires from football, becoming the first player to walk away in his prime out of fear of long-term brain damage.

Añadido al timeline:

How football has gotten where they are with concussions

ByMatthew LaPorte

23 nov 2017

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17 mayo 2015 año

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