Oakland coach Dennis Allen told reporters that No. 3 receiver Jacoby Ford may miss some time with a sprained foot.

It is the same foot that cost Ford several games last season. Allen said the injury could keep Ford out of action once the regular season starts. Ford’s injury could mean serious playing time for rookies Juron Criner and Rod Streater. It also makes the trade of the reliable Louis Murphy (he was sent to Carolina for a conditional seventh-round pick) look less wise.

Veterans such as Plaxico Burress and Chad Johnson are available. If the Raiders suffer any more injuries at the position or if Ford's lingers, outside help may be necessary at a position that looks thin, at least for now.

The Raiders had several other injuries Friday in a loss at Arizona, but Allen doesn’t think any of them are serious at this point.

Meanwhile, Arizona quarterback Kevin Kolb took umbrage with the derogatory comments Oakland defensive tackle Tommy Kelly made about him Friday night.