Raiders' Brown practices; NFL reportedly flunks helmet

Oakland Raiders wideout Antonio Brown was a full participant in the team's walkthrough on Saturday and could be a full participant as soon as Sunday, head coach Jon Gruden told reporters.

"He took all the reps today in our walkthrough," Gruden said. "He showed great retention, and we'll see what happens here with this afternoon; we're going to have a walkthrough today as well. We have a lot of guys that can't practice so we'll pick it up tomorrow."

Brown had taken part in just one walkthrough and one full-speed practice in training camp before Saturday, as his feet recover from blisters caused by a cryotherapy mishap. He also had been absent from the team last week while trying to sort out an issue with his helmet, as his old one is no longer approved for NFL use because it is more than 10 years old.

One of Brown's potential solutions to his helmet conundrum can apparently be ruled out. Brown has used social media to seek out versions of his helmet model -- the Schutt AiR Advantage -- that are less than 10 years old, but Pro Football Talk reported late Saturday night that the NFL tested a 2011 version this week, and it failed.

Per the report, the league believes any Schutt AiR Advantage helmet, whether from the last 10 years or not, will not pass testing.

After Pro Football Talk posted a story about the subject on Twitter, Brown responded with a tweet apparently accusing the NFL of racial prejudice, using the N-word and writing "Super Prejudice unbelievable!"

It's unclear what helmet Brown has been wearing during practices with the Raiders, or if he'll have an approved one to use when he returns to full-speed sessions.

The league's requirement of approved helmets technically applies to all practices and games, with teams at risk of punishment for any of their players who practice or play with disapproved helmets.

--Field Level Media