This week was to be the last chance Raiders safety Nate Allen would have to see game action. And according to Jack Del Rio, that prospect is not very likely.

"It doesn't look like it's a real strong likelihood," Del Rio said of the possibility Nate Allen could return this week.

Allen went out with a knee injury in the team's season opener and was placed on injured reserve with designation to return. He did return in week 10, but in just his fourth game back, he again went down with a knee injury and has yet to return.

The Raiders signed Allen to a 4-year, $23 million contract this offseason with $11.8 million guaranteed. Only his $6.9 million base salary was guaranteed. The remaining $4.9 million in guarantees kick in if he is on the roster three days after the 2016 Super Bowl.

Replacing Allen much of this season has been TJ Carrie with Taylor Mays get a start and extensive playing time.

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