He has done random drug screens and erased a few friends from his circle to make football a priority. You always hope that they can stay on the right path when they see those pay checks but who knows. Thats why a strong locker room is important as well. He will have Mathis right there with him and some great vets.
Manziel was a different story. He never truly changed or had to. He was a silver spoon kid who never had to worry about money. Getting dropped from a team with no money is not going to hurt him like others so he clearly shows no remorse with previous and current decisions.