The Facts: Brown was back on the field with his teammates Tuesday. The Oakland Raiders' star receiver attended the early portion of practice, which doesn't require a helmet, per NFL Network's MJ Acosta. However, when Raiders players put their helmets on for stretching and warmups, Brown headed off the field. He later returned sans a helmet.

Diehards Line: The 31-year-old receiver filed a second grievance in his attempt to wear his preferred helmet, NFL Network Insider Ian Rapoport reported on Monday. Brown, who had his first helmet grievance denied by an arbitrator on Aug. 12, is now arguing he should be provided the same right as other players in terms of having a one-year grace period to phase out using his helmet. He is claiming the NFL is arbitrarily applying its rules. Brown is also still dealing with a frostbitten feet issue stemming from a cryogenic therapy chamber mishap. ... Stay tuned.