Raiders vs. Broncos injury report: Darrius Heyward-Bey out indefinitely

Oakland Raiders wide receiver Darrius Heyward-Bey fell victim to a vicious hit from Pittsburgh Steelers safety Ryan Mundy on Sunday and has been diagnosed with a concussion and a strained neck after being knocked unconscious.

According to Raiders head coach Dennis Allen via the SFGate Blog, Heyward-Bey and the Raiders are thankful that it wasn't much worse.

"We're blessed," Allen said. "The concussion is obviously issue than anything else right now. He's a guy that we're going to have to continue to evaluate and see where he's at. We were all pleased to see that it wasn't anything severe as far as neck injury or anything like that."

Heyward-Bey has struggled along with the rest of the Raiders offense in 2012, amassing only seven catches for 84 yards through the first two games of the season. He had a touchdown catch during Week 3 vs. the Steelers and was targeted for a second on the play where he was injured.

Mundy also knocked out tight end Brandon Myers, who suffered a concussion on a different play late in the game. Myers will go through NFL protocol regarding head injuries and suit up when cleared.