The NFL’s competition committee has mandated that all linemen, tight ends and linebackers wear the mushroom-like caps up until the second preseason game.
NEW YORK — The mushroom-like contraptions NFL players are wearing on their helmets during training camp may look strange, but they’re a part of an ongoing safety experiment the league hopes will lead to a reduction in head injuries.
They’re called Guardian Caps, and they’re now mandatory for all 32 NFL teams through the second preseason game — the time when the league says head injuries are most prevalent.
“There’s a density of exposure, and a density of injury, at the
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