FRISCO (AP) — Dallas defensive lineman David Irving will miss his second straight game with a concussion when the Cowboys visit Oakland on Sunday night, and cornerback Orlando Scandrick also is out again with a back injury.

Linebacker Justin Durant also was ruled out Friday because of a concussion.

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Irving and Scandrick were injured in Dallas’ win over Washington two weeks ago. Irving played the entire game before being diagnosed with a concussion. Scandrick sustained a small fracture in his back and also kept playing before leaving the game.

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Irving is second on the team with seven sacks despite sitting the first four games on a suspension for violating the NFL’s policy on performance-enhancing drugs. Scandrick is the veteran leader in a young secondary.

The Cowboys need a win to maintain realistic wild-card playoff hopes in the NFC.

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