Linebacker Will Compton started out as an undrafted free agent, working his way from the practice squad to the Washington Redskins' starting lineup. Chris Baker traveled that same route earlier. Dashaun Phillips has traveled from Division II Tarleton State to going undrafted to being the first team nickel corner. There's also Quinton Dunbar, who went from undrafted receiver to backup corner in one year. The point being, of course, is that there's often an undrafted free agent who sticks around and becomes a key contributor.
That said, here are some undrafted free agents who have jumped out this summer: