Cracks me up that people confuse playing safety with playing corner. Ball, was a mess as a safety, as a corner, he was good depth.
McCann meanwhile, made a play (100-yard INT return) but what most people forget was that he was torched all day that game and in subsequent games.
I think McCann is fighting for a spot with the rookie Jason Thomas. The Cowboys have always liked Ball as solid depth as a cornerback. I doubt his troubles playing a new position changed any of that.
The Cowboys already have a pleathora of kick returners, so McCann is going to have to show something as a defensive back.