NFL League Rulebook A62 63 National Anthem Rule
US Soccer: Players Must Stand During National Anthem
The Indignity of the N.F.L.'s New National-Anthem Policy
NFL national anthem policy requires players on field to stand - Sports Illustrated
NFL's new anthem policy requires players to stand on sideline or remain in locker room
The NFL's new rule against kneeling during the anthem shows the owners' willingness to grovel
NFL owners adopt policy that requires players stand for anthem - Sports Illustrated
Civil rights groups protest at NFL HQ for players' right to kneel
The NFL might change its rules to force players to stand for the national anthem - Vox
Americans opposed to pro sports leagues requiring standing for anthem
US Soccer has repealed policy requiring players to stand for National Anthem
NFL Issues National Anthem Rule: League Has Done So Before