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Oakland Raiders wide receiver Darrius Heyward-Bey, left, is hit by Pittsburgh Steelers safety Ryan Mundy during the fourth quarter of an NFL football game in Oakland, Calif., Sunday, Sept. 23, 2012. (AP Photo/Marcio Jose Sanchez)

DENVER -- The Raiders downgraded wide receiver Darrius Heyward-Bey (concussion) and tight end Richard Gordon (hamstring) to out Saturday, meaning neither will play against the Denver Broncos.

It's not a surprise Heyward-Bey won't be playing, given that as of Friday he hadn't passed any of his concussion tests and the severity of the blow he took from Pittsburgh's Ryan Mundy.

Gordon's absence will be felt in that the Raiders use a lot of packages with three tight ends and now will have only two -- Brandon Myers and David Ausberry -- active.

Gordon is also a core special teams player and leads the Raiders with four special teams tackles.

The Denver Broncos meanwhile, promoted former San Jose State star Duke Ihenacho from the practice squad as well as ex-Cal player Mike Mohamed. Ihenacho is a safety, Mohamed a linebacker.