The Dallas Cowboys are adding a new ingredient to their offensive backfield.
Veteran free-agent running back Dalvin Cook is signing with the Cowboys, NFL Network Insider Tom Pelissero on Wednesday. Cook is expected to join the Cowboys' practice squad initially, per Pelissero.
Cook visited the Cowboys on Monday, but he left without signing a deal before agreeing to terms.
There are three running backs currently on Dallas' active roster following Tuesday's deadline to trim rosters to 53: Ezekiel Elliott, Rico Dowdle and Deuce Vaughn. The Cowboys have not yet announced their 16-man practice squad, which Cook is expected to join as he ramps up for the season.