The draft could halt that move, especially if Dallas selects a left tackle in the first round.
But SI's Peter King speculates that the Baltimore Ravens might work a trade with their left tackle, Jared Gaither, to the Cowboys. Gaither is a restricted free agent, who received a first round tender. The Ravens are shopping him but it's uncertain if anyone is serious about making a deal.
If Dallas trades for Gaither it pushes Free to possibly compete for the starting right tackle spot held by Marc Colombo, or back to the bench.