https://www.espn.com/nfl/story/_/id/27356491/sources-ab-says-no-football-old-helmet First he threatens to retire (if he can't wear his 11 year old helmet). Claims newer helmets hamper his vision. (And his camp absence has been more an issue of helmet than the frost bite he got from not wearing approved foot gear in cyro tank this summer in France.) Raiders Antonio Brown Files Grievance Over Helmet Then he files grievance Raiders' Jon Gruden defends AB's helmet grievance, injury Raiders' coach supports grievance Paywall. Threatening the league over head injury if forced to change helmet (And just in case, he's been an issue at camp already With frostbite and helmet issues, Antonio Brown is testing... Paywall. Friday article - dealing with temperamental athlete. Kawakami: One thing is clear amid the Antonio Brown chaos... Paywall. Friday article; opinion - will he be with team only a short time?) Definitely some dissension between player and team (and now league). Just the grievance part will be interesting to follow. Has extensive testing been done on the old and new helmets to the point that insurers would insure only one in the case of injury? Will the statute of limitations be called into play if injury isn't discovered for years? Given the craziness of the concussion suit vs the league, the only ones who are really salivating over this are the lawyers (and those with popcorn concessions).