You can always change your name
Adam "Pacman" Jones doesn't want to be known as "Pacman" anymore.

One assumes Jones doesn't want to be associated with the name of a guy who has caused so much trouble.

Fine, I guess. But the real question is if Jones himself can change, and if he can prove to the Cowboys (and the NFL) that he's not a lost cause.

This is not an unprecedented move. In the early 1990s, the Indians had a troubled outfielder who went by Joey Belle. In an attempt to show maturity (I think), Belle went back to his given name of Albert.

And he never had any off-the-field problems again.

OK, bad example.

The point is, talking about change is one thing. Until Jones can go through an extended period of time without trouble, the "Pacman" reputation will follow, even if the name does not.