Cowboys address offensive line depth concerns during preseason camp

The Dallas Cowboys have expressed worries about the depth of their offensive line as they near the end of preseason activities. Despite a $50 million investment in their top six offensive linemen, the team's backups are lacking experience and reliability. Rookie Drew Shelton is considered not yet NFL ready, while returning second-year player Nate Thomas is struggling in training camp. The Cowboys are hoping to bolster their offensive line depth before the regular season begins, yet they may find it difficult to acquire additional linemen as other teams also seek to improve their roster.

• 6:38 PMYahoo Sports — Despite $50M investment, Cowboys have glaring depth issue in key group