FILE - In this Sept. 24, 2012, file photo, a tribute to NFL Films' Steve Sabol is shown during an NFL football game between the Green Bay Packers and the Seattle Seahawks in Seattle. “Hard Knocks,” which started 20 years ago, is one of Steve Sabol's many legacies at NFL Films that continue to live on. Sabol, who was 69 when he died from brain cancer in 2012, is one of three contributors that are part of the Hall's 2020 Centennial Class. (AP Photo/Ted S. Warren, File)