The Dolphins still are in the market for a tackle after 2008 No. 1 overall pick Jake Long signed with the St. Louis Rams. They're happy with 2012 second-rounder Jonathan Martin, but they still need another starter. The Dolphins drafted Tennessee offensive tackle Dallas Thomas in the third round of the 2013 NFL Draft, but NFL Network draft analyst Mike Mayock called him a better prospect at guard, where he played in 2012. Thomas was the lone lineman the Dolphins picked in the draft.