While Antonio Brown is `gathering information,’ Raiders struggle on offense

Raiders coach Jon Gruden is awaiting information as to when wide receiver Antonio Brown will return from injury.NAPA — The Raiders continue to worry about things they can control, and it was clear Tuesday they have no control over Antonio Brown.

Brown wasn’t at practice, and any rehabilitation on his blistered feet is being done out of sight. Brown, whose Instagram photo (since deleted) is the only clue as to why he’s not practicing, has been quiet on social media.

After the Raiders had a less than crisp day offensively, coach Jon Gruden had little to say about Brown and when he might return.

“I have nothing new on that, no,” I have no new news,” Gruden said.

Asked if he could say whether Brown…