ALAMEDA, Calif. -- Antonio Brown took part in a pre-practice walkthrough at the Oakland Raiders' facility Tuesday before retreating to the weight room, changing into cleats from sneakers, and then returning for the end of the team stretch period.
And with that, the media viewing window closed as practice began.
Brown, who has filed a second grievance against the NFL over his being denied use of his preferred helmet, never had a helmet in his possession so it was not clear how much the receiver would participate.
Coach Jon Gruden is scheduled to speak to reporters following practice.