The DUI may be in the past, but from what I've heard here in Athens is that his behavior has not changed. And as you probably have noticed, Berryman's actions also may have been in the past, but the behavior remained constant. Thus his subsequent dismissal from not only the Cyclones, but also the Barnstormers. If there is no change in behavior or attitude, nothing has been solved.
If I were Pollard, I'd want to be 100% positive that his drinking problems were behind him before I'd offer him a position. Rings too close to the Eustachy drama otherwise, media would rip him apart.