IRVING, Texas -- With the Miami Dolphins losing a left tackle and left guard, the team signed guard David Arkin off the Cowboys' practice squad Tuesday.
Arkin, a 2011 fourth-round pick from Missouri State, was cut last week then placed back on the Cowboys' practice squad. The Cowboys valued Arkin's abilities to play both guard positions. As recently as last week, coach Jason Garrett said Arkin was improving.
The Cowboys have just one offensive lineman, guard Ray Dominguez, on the practice squad.
The NFL is investigating the troubled relationship between the two offensive linemen.