Athletes and activism: The long, defiant history of sports protests
5 Problems With The NFL's National Anthem Protest
Anthem Demonstrations Include a Show of Unity in Cleveland - The New York Times
National Football League To Fine Teams if Players Protest National Anthem
In protest of the NFL – The Nevada Independent
NFL puts the brakes on policy requiring players to stand for the national anthem - CBS News
National anthem is inseparable from politics
Baseball Fans In New York State Outraged Over Anthem Controversy
Jets acting owner: I'll pay fines if my players don't stand for national anthem - CBS News
Chris Long on the new NFL anthem rules: 'This is not patriotism' - The Boston Globe
The National Anthem In Sports: History, Policy, and Protests
Timeline of NFL protests during the national anthem – KIRO 7 News Seattle