Both Vince Young and JaMarcus Russell are attempting comebacks. Both are way physically talented. I would take a flier on one of them, to be honest. Little to lose. Both may have learned a lesson and grown up a bit. Both were immature and always had everything come easy to them. Russell has dropped 27 lbs. But 27 lbs from what weight I do not know.
Young was on First Take this AM. He truly seemed much more mature. Even playing as a non-working, immature brat, he still has a pretty good W-L record.
Both those guys are as physically talented as any QB out there. If they grew up and are ready to take the game seriously, they could be as good as there is. I would like to add players WHO HAVE A CHANCE TO DEVELOP INTO SOMETHING SPECIAL instead of just signing guys with no upside. I am sick of all their bum signings who have no upside.