I would not be surprised to see 'ringer, Hall, and Marstellar call it a career at trials. Hall hasn't really been that into it since his senior year of college, 'ringer is a 'tweener in the most brutal sense, same with marstellar. They are both very good, but neither of them has the frame or the style to be consistently making teams and succeeding.
Downey will probably be done after this, but he lives in his own world, and I don't think he would view a "shoes on the mat" exit as a reasonable thing to do.