NFL finally admits link between football, brain diseases

NFL finally admits link between football, brain diseases Seattle Seahawks defensive end Cliff Avfril (56) is down with a concussion during the NFL Super Bowl XLIX football game against the New England Patriots on Sunday, Feb. 1, 2015 in University of Phoenix Stadium in Glendale, Arizona. The Patriots defeated the Seahawks 28-24. (AP Photo/Kevin Terrell)
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