FILE - This Aug. 9, 2014 file photo shows an NFL logo on a goal post padding before a preseason NFL football game between the Detroit Lions and the Cleveland Browns at Ford Field in Detroit. In a two-year content and advertising deal announced Monday, Aug. 10, 2015, Twitter is huddling with the National Football League as it tackles the challenge of attracting a broader audience to its short messaging service. (AP Photo/Rick Osentoski, File)