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Raiders GM: Time for AB to be 'all in, or all out'

NAPA, Calif. -- Antonio Brown left training camp again Sunday and while Mike Mayock said it was over the receiver's anger from being denied use of his helmet, the Oakland Raiders general manager also issued an ultimatum to Brown.

"You all know that AB is not here today, right?" Mayock told a group of beat reporters as practice began Sunday afternoon. "So, here's the bottom line -- he's upset about the helmet issue. We have supported that, we appreciate that. But at this point, we've pretty much exhausted all avenues of relief.

"So, from our perspective, it's time for him to be all in, or all out, OK?