Demps' commitment to track means he wouldn't be eligible to contribute to the Patriots until midway through the 2013 season, by his own estimation. The Patriots covered themselves with the free-agent signing of receiver Leon Washington, but the question remains what the team will do with Demps, a running back and return man.
Demps' world-class speed (he was a silver medalist on the U.S. 4x100 relay team in the 2012 London Olympic Games) makes him an attractive target, and he likely could be acquired at a discount rate. Still, Demps has been up front that football is not his top priority. It's hard to imagine the Patriots would be dealing with a substantial market for him.
Even if Demps never plays a regular-season down, the NFL has been very good to him. The Patriots paid him approximately $400,000 to carry him on their roster and stash him on injured reserve. Not bad work if you can get it.