The league's updates are based on “head impact severity” reviews conducted with input from the NFL Players Association.

Ten other models were also deemed “Guardian Cap optional,” meaning that they perform well enough that the NFL won't require players with those helmets to wear a Guardian Cap during training ...

In case you missed it, the Green Bay Packers had a big 30-13 win on Sunday Night Football over the Seattle ... the game with the addition of a Guardian Cap, likely worn as a precaution following ...

Football sometimes gets a bad rap ... everything was being done to help players be safe. The purpose of the Guardian cap is to help prevent head injuries.” Vincent said that the cap is like ...