FILE - In this Jan. 10, 2010, file photo, New England Patriots linebacker Junior Seau (55) warms up on the field before an NFL wild-card playoff football game in Foxborough, Mass. Star linebacker Junior Seau had a degenerative brain disease when he committed suicide last May, the National Institutes of Health told The Associated Press on Thursday Jan. 10, 2013. (AP Photo/Charles Krupa, File)

FILE - This Jan. 10, 2010, file photo shows New England Patriots linebacker Junior Seau before an NFL wild-card playoff football game in Foxborough, Mass. The family of Junior Seau has sued the NFL, claiming the former linebacker's suicide was the result of brain disease caused by violent hits he sustained while playing football. The wrongful death lawsuit, filed Wednesday, Jan. 23, 2013 in California Superior Court in San Diego, blames the NFL for its "acts or omissions" that hid the dangers of repetitive blows to the head. (AP Photo/Charles Krupa, File)

FILE - In this Jan. 10, 2010 file photo, New England Patriots linebacker Junior Seau (55) reacts on the field during an NFL wild-card playoff football game in Foxborough, Mass. The family of Junior Seau has sued the NFL, claiming the former linebacker's suicide was the result of brain disease caused by violent hits he sustained while playing football. The wrongful death lawsuit, filed Wednesday, Jan. 23, 2013 in California Superior Court in San Diego, blames the NFL for its "acts or omissions" that hid the dangers of repetitive blows to the head. Helmet manufacturer Riddell Inc., also is being sued by the Seaus, who say Riddell was "negligent in their design, testing, assembly, manufacture, marketing, and engineering of the helmets" used by NFL players. (AP Photo/Elise Amendola, File)