The Denver Broncos will likely either resolve their right guard issue in-house or in the draft. But here are some names that could be intriguing. T.J. Lang played well for the Green Bay Packers, but has been injured quite a bit with Detroit. The only way the Broncos would likely consider it is if he agreed to a one year deal.
Another interesting name that could be of intrigue is a reunion with Ben Garland. It was a shock to see the Broncos not bring him back, but I do not think he would cost much. It would really depend on how the market looks.
If the Broncos were to solve the guard issue in free agency, it likely will not happen until later on and on short term deals. But the thought of a veteran presence in Lang or a reunion in Garland would be something worth looking at.