Guardian Caps Guardian Sports
Guardian Cap debuts during minicamps in effort to reduce avoidable head contact
3 things to watch during Friday's Patriots training camp practice - Pats Pulpit
Antonio Brown helmet issue: Raiders GM calls out wide receiver - Los Angeles Times
Players to watch on the fourth day of Patriots training camp - Pats Pulpit
Arizona Cardinals defensive end J.J. Watt not fan of the new league-mandated Guardian Caps on helmets
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Guardian Caps Guardian Sports
Packers LB De'Vondre Campbell on wearing Guardian Caps: 'I just think it's stupid'