By MARK ANDERSON AP Sports Writer LAS VEGAS — Dak Prescott passed for 268 yards and four touchdowns, and the Dallas Cowboys dominated the spiraling Las Vegas Raiders, 33-16, on Monday night in the Cowboys’ first game since the death of defensive end Marshawn Kneeland.

The 24-year-old Kneeland was found dead on Nov. 6 of an apparent suicide. Coach Brian Schottenheimer and Cowboys players wore shirts honoring Kneeland, and they bowed their heads during a moment of silence before the game.

The Cowboys (4-5-1) then played one of their best games of the season to keep alive their slim playoff hopes. Dallas had lost three of four and has games coming up against Philadelphia, Kansas City and Detroit.

Las Vegas (2-8) continued its downward slide under first-year coach Pete Carroll. The Raiders

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