After Thursday's practice, the Oakland Raiders may be a little bit thin at a couple of positions.
Wide receiver Darrius Heyward-Bey, who caught four passes and was targeted seven times by Jason Campbell Monday, injured his knee in practice Thursday and was limited the rest of the way through practice. With Jacoby Ford and Louis Murphy already injured, that leaves the Raiders with Nick Miller, Denarius Moore, Chaz Schilens and Derek Hagan as the healthy wideouts.
Their starting cornerback Chris Johnson was limited at practice on Wednesday, but practiced in full on Thursday. He's been dealing with a groin injury. In the secondary, starting safety Michael Huff has failed to practice this week. Neither has backup safety Michael Mitchell.
Defensive tackle Richard Seymour has also missed both days with a rib injury.