Nfl

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**FILE** Washington Redskins quarterback Donovan McNabb watches the closing minutes of the Redskins' 59-28 loss to the Philadelphia Eagles in an NFL football game, Monday, Nov. 15, 2010, in Landover, Md. AP Photo/Nick Wass)

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Rep. Linda Sanchez, D-Calif., views a older NFL football helmet during a hearing titled "Legal Issues Relating to Football Head Injuries, Part II" in Detroit, Monday, Jan. 4, 2010. (AP Photo/Paul Sancya) ** FILE **

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Atlanta Falcons' Peyton Thompson, left, works against Cincinnati Bengals' Troy Stoudermire during a joint practice at NFL football training camp at the Falcons' practice facility, Monday, Aug. 5, 2013, in Flowery Branch, Ga. (AP Photo/David Goldman)