Preston released; Washington promoted again

The Cowboys released center/guard Duke Preston to make room on the 53-man roster for running back Chauncey Washington.

The Cowboys signed Preston, who had starting experience with the Buffalo Bills, during the preseason. He was inactive for the first four games.

Washington was promoted from the practice squad for last week's loss against the Denver Broncos, released and re-signed to the practice squad. He'll likely be active Sunday against the Kansas City Chiefs to play on special teams and provide insurance at running back, with Felix Jones (knee) doubtful and Marion Barber (quadriceps) not completely healthy.