FILE - This Nov. 3, 1986 file photo shows Chicago Bears’ Dan Hampton (99), Mike Singletary (50) , Steve McMichael and Richard Dent (95) all moving in to bring down Los Angeles Rams’ running back Eric Dickerson during an NFL game in Chicago. Dickerson is the latest former player to sue the National Football League and seek compensation for head injuries. Dickerson is the lead plaintiff among 15 men named in the suit filed Monday, May 21, 2012, in federal court in Houston. (AP Photo/Fred Jewell, File)