Jonathan Martin is a mixed bag at left tackle, and depth is a concern at right guard, where a handful of backups have attempted to fill the shoes of John Jerry, who's been missing since the first week of training camp with an ailing knee. Now, one of those backups, Nate Garner, has injury concerns of his own.
Miami hardly can afford to lose help on the line. The Dolphins have struggled as a run-blocking unit this summer, and Tannehill is seeing too much pressure. For all the heady offseason additions, there won't be much to cheer about in South Beach if the quarterback is running for his life.