Oakland Raiders superstar wide receiver Antonio Brown lost his grievance against the NFL over wearing his old helmet, a source confirmed to ESPN’s Josina Anderson.

Brown wants to wear the helmet he prefers, not one of the newer-model helmets that league rules mandate, league sources told ESPN’s Adam Schefter. Brown believes the new certified helmet protrudes out and interferes with his vision as he tries to catch the football.

USA Today was first to report that Brown lost his grievance.

On Friday, Brown had a two-hour conference call with an independent arbitrator, sources told Schefter, to argue why he should be allowed to wear his 10-year-old helmet. He is thought to have been using the same helmet his whole career.

The arbitrator for the grievance call was joined by league officials, player representatives and NFLPA representatives in Philadelphia, a source told ESPN.