The Miami Dolphins have a very intriguing defense and lots of potential at the skill positions on offense, but how well their 2013 campaign goes will depend a lot on what they can draw out of their offensive line. The one glaring hole in that line is arguably the most important spot: left tackle. As we noted last week, Jonathan Martin has had trouble slowing down rookie Dion Jordan and second-year defensive end Olivier Vernon in practice. So how did Martin and his backup, Dallas Thomas, fare in their first preseason action Sunday against the Dallas Cowboys?
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