The move is surprising because the Dolphins will almost certainly not play him or have him on the active roster. This appears on the surface to be more or less a move to keep another team from signing him off the practice squad.
Thomas fell out of favor in Arizona which led to his release. A highly athletic quarterback coming out of college, the Cardinals believed that he could eventually replace Carson Palmer but Thomas didn’t develop at the pace or show the signs of improvement that the Cardinals saw in him when they drafted him.
Hailing from Virginia and attending Virginia Tech, Thomas had high aspirations for the NFL.