ALAMEDA, Calif. — When the Oakland Raiders went through warmups and drills Sunday before practice, wide receiver Antonio Brown was present, accounted for and wearing a helmet.

Brown, who was traded by the Pittsburgh Steelers in the offseason, has been working with the NFL and going through proper channels in an effort to wear a preferred brand of helmet. The NFL Network reported Brown lost a second grievance procedure.

The Raiders believe both of Brown’s training camp issues — feet with frostbite-like symptoms and the helmet issue — are in the rearview mirror. Coach Jon Gruden believes Brown is on track to start Week 1 against the Denver Broncos on Sept. 9.

Brown, according to Profootballtalk.com, has narrowed his options on a helmet from multiple companies and is expected to receive an endorsement deal when he selects one to use in the regular season.

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