The league’s media policy is clear: “Players must be available to the media following every game and regularly during the practice week as required under league rules. Star players, or other players with unusually heavy media demands, must be available to the media that regularly cover their teams at least once during the practice week in addition to their required post-game media availability. . . . Each club will open its locker room during the normal practice week (based on a Sunday game) on Monday, Wednesday, Thursday and Friday to all accredited media for player interviews for a minimum of 45 minutes.”
http://profootballtalk.nbcsports.com/2014/11/20/like-it-or-not-nfls-media-policy-is-clear/