Agreed. But at this point it is beyond proven or not proven. Its now about health of these cats. The same guys that have injury histories are having them again. And hammys rarely just go away.
In the case of McFadden true, but it appears to be a situation where the training staff and coaching staff are being cautious. I can understand why. It is early enough in camp to give McFadden this time. While he will not play Thursday I fully expect him to be able to play in the following 3. Dallas knew when they signed him of his injury history yet are willing to take the chance on him. I think they will play him within pre season and make a determination on what they will do. Randle not much in terms of injury just not a lot of playing time, I think it is fair to say when given a chance to play he has done well but of course with so few carries it is hard to claim one way or the other on how he will do in an expanded role. Not enough information to know Pro or Con.
Dunbar is another who had dealt with injury, to date the only game he played where he looked as if he had the ability was vs Raiders a couple of years ago on thanksgiving where he had a big day but of course the day ended for him with yet another injury.
All of this has been hashed out over and over. So now we get to the reality, I don't think there is much out there in the FA market that does not come with doubts. If these guys who are currently FA are still out there it tells me other teams are not that high on them either. Waiting on cut downs you very well could find an experienced decent RB who gets caught up in the numbers game as teams have to get to 53. other than that only other option becomes trade.