Antonio Brown has been trying to allow the NFL to wear the helmet he has worn since entering the NFL in 2010. On Sunday, Brown has lost his second helmet grievance against the NFL per Ian Rapoport.

Rapoport also added that there aren't any more proceedings scheduled—for now.

To begin training camp, Brown was absent from practices due to an unusual injury to his feet. Additionally, it just so happens that the Raiders offseason acquisition was also a no-show due to controversy with his helmet.

The All-Pro wide receiver tried to wear the same helmet he's worn for his entire NFL career. The NFL informed Brown that he wouldn't be able to wear the helmet in the upcoming season.

As a result, Brown filed a grievance to the NFL to grant his request to make an exception for his helmet. To the dismay of the Raiders receiver, the NFL denied his grievance but did give him some options.

One of those options was to find a helmet that was the same model as the one he had but it had to be made within the last 10 years. Brown was able to get his hands on one that was made in the past 10 years but it wasn't approved by the league.

In an ongoing process, Brown filed another grievance and the hearing was scheduled for this past Friday. Finally, the results came from the grievance on Sunday and to no one's surprise; the NFL denied it.

Nonetheless, we seem to be coming to an eventual end to Brown's helmet saga with him sporting a helmet in practice on Sunday.