Watching the first few days of the Dallas Cowboys training camp in Oxnard, California, some fans are wondering about those padded caps some of the players are wearing over their helmets.
It's something new mandated by the NFL as a safety measure.
Called the Guardian Cap, the padding is mandatory for all offensive linemen, tight ends, defensive linemen, and linebackers who must wear the helmet shells from the beginning of training camp until the second game of the pre-season.
The league claims there is research showing that time period often results in more concussions because players are competing for final roster spots and getting their first full-contact reps after being away from football during the off-season.
ESPN reports that the first two weeks of training camp typically produce around 30 concussions, league wide, every year.
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