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 then placed back on the Cowboys' practice squad last week. But the Cowboys valued Arkin's abilities to play both guard positions. As recently as last week, coach Jason Garrett said the player was improving. Arkin never played in a regular-season game for the Cowboys, surpassed by veteran players such as Nate Livings and Mackenzy Bernadeau and even second-year guard Ronald Leary.
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