FILE - In this Sept. 4, 2009, file photo, San Diego Chargers cornerback Paul Oliver stretches prior to an NFL preseason football game against the San Francisco 49ers at Qualcomm Stadium in San Diego. The wife and sons of former San Diego Chargers defensive back Paul Oliver are taking legal action against the NFL for wrongful death, blaming sports-related concussions for his suicide last year. The suit was filed Monday, Sept. 22, 2014, in Los Angeles County Superior Court against the league, the Chargers, the New Orleans Saints and the corporations that own several helmet manufacturers. (AP Photo/Denis Poroy, File)