The Dallas Cowboys officially have an opening at left guard after 2017 starter Jonathan Cooper signed a free agent contract with the San Francisco 49ers.
The 49ers announced the one-year deal via Twitter Tuesday afternoon.
The Cowboys were already looking to upgrade the position, but now they have no choice with Cooper, who started 14 games in 2017, leaving in free agency and no other options on the roster.
Joe Looney, a backup guard/center the past two years, is also a free agent as is Byron Bell, who had disappointing turns at guard and tackle in 2017.