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Junior Seau Had Brain Disease Caused by Repeated Head Trauma

NFL reacts to the latest news surrounding star linebacker who ended his own life.
03:06 | 01/10/2013

Transcript for Junior Seau Had Brain Disease Caused by Repeated Head Trauma

And now tonight, we have an abc news/espn exclusive report that's jolted the world of professional football. Junior seau was the star player who killed himself last may. And now abc's jim avila breaks... See More
This transcript has been automatically generated and may not be 100% accurate.
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