FRISCO, Texas -- At different points this season, Dallas Cowboys owner and general manager Jerry Jones has talked about how help is on the way for a beleaguered defense.

On Monday against the Las Vegas Raiders , that help will arrive with the returns from serious knee injuries of linebacker DeMarvion Overshown and rookie cornerback Shavon Revel, as well as the trade-deadline pickups of All-Pro defensive tackle Quinnen Williams and linebacker Logan Wilson .

Overshown and Revel have practiced for the last three weeks, while Williams and Logan have gone through two practices this week after being acquired before the Cowboys' bye week.

In addition to getting ready to play, they also have had to deal with the tragic loss of teammate Marshawn Kneeland.

"We've got to keep Marshawn's

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