The Raiders have to get better at wide receiver in a hurry.

That’s the word from head coach Klint Kubiak, who said in reviewing Thursday’s preseason game that the wide receiver group needs improvement between now and Week One. Asked what he learned about his wide receivers at the joint practice and preseason game with the Texans, Kubiak sounded decidedly negative.

“I learned a lot, that we have to get a lot better very fast,” Kubiak said. “We took a step backwards. That doesn’t mean we can’t go forward, but right now we are trying to find someone that is accountable and can help us on Sunday. Still looking.”

The Raiders’ current starting…

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