Antonio Brown's old helmet is still in a familiar place: Madden - Polygon
Antonio Brown May Retire Over the NFL's Helmet Policy - The Ringer
Sources -- AB says no football without old helmet - ESPN
Antonio Brown's Helmet Standoff Nears a Conclusion - The New York Times
Antonio Brown Threatens Not To Play If He Can't Wear Old Helmet
5 things to know about Antonio Brown - The Boston Globe
Report: Antonio Brown Threatens to Quit Football over Helmet Grievance, News, Scores, Highlights, Stats, and Rumors
Explaining Antonio Brown's helmet issue: What are the NFL's rules, Raiders' options, AB's contract?
Oakland Raiders receiver Antonio Brown practices — in certified helmet - The Boston Globe
Antonio Brown's timeline of trouble: From Steelers benching to suspensions and Buccaneers release