Antonio Brown's bizarre helmet drama isn't over.

Earlier this month, the Oakland Raider filed a grievance against the NFL over a rule that prohibited the use of any helmet over 10 years old. This mean Brown could no longer wear his preferred Schutt AiR Advantage helmet, which he used throughout his first nine seasons. And if he failed to comply, he would risk losing his pay.

An arbitrator ultimately ruled against Brown, so he called on his social media followers to find a newer version of the Schutt AiR Advantage. But the search wasn't going to be easy, as Schutt stopped producing the AiR Advantage in 2011.

According to ProFootballTalk's Mike Florio, the athlete was able to find a NOCSAE-certified helmet from 2010. The helmet was recently sent to the NFL for examination, and it, unfortunately, failed testing.

Brown responded to the the PFT report via Twitter:

But there's still a little hope: Brown also has managed to track down a 2014 Schutt AiR Advantage helmet that was reportedly made for a film. PFT reports that 2014 version has yet to be tested.

Minor clarification: The helmet that was certified by NOCSAE but then separately tested by the NFL was made in 2010. Brown also found an AiR Advantage helmet made in 2014, which has yet to be tested by the NFL. Brown's representatives now presume that any AiR Advantage will fail.

— ProFootballTalk (@ProFootballTalk) August 17, 2019

Stay tuned.