ALAMEDA, Calif. (AP) The Oakland Raiders have signed fifth-round running back DeAndre Washington to a four-year contract.

The Raiders also signed 13 undrafted free agents, including former Duke receiver Max McCaffrey. McCaffrey is the brother of Heisman Trophy runner-up Christian McCaffrey and son of former NFL receiver Ed McCaffrey.

Washington was selected with the 143rd pick out of Texas Tech. He is being counted on to give support to starter Latavius Murray.

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The other free agents are receivers K.J. Brent and Johnny Holton; offensive linemen Ross Burbank and Oni Omoile; defensive linemen James Cowser, Drew Iddings and Darius Latham; defensive backs Kenneth Durden, Antonio Hamilton and Tony McRae; tight end Ryan O'Malley and linebacker Kyrie Wilson.

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