Fev needs to be able to associate football with a life devoid of the things that are bad for him. By people around him removing stimuli such as alcohol and gambling, he will learn to be able to put playing football into a context that doesn't involve the things that are harming him. This is why it is so important that people he respects are able to display the kinds of behaviour that Fev should be displaying. Playing footy at a second-tier club could be a great move, as long as the guys he's playing with can earn his respect for things that don't involve the stuff that's hurting him. Positive role models are so important in situations like this, even for a guy his age.
The second important aspect that fading from the public's eye a little - but not entirely - will bring, is the vague fear or recognition that if he REALLY stuffs up, he'll be called on it and his reputation will be further damaged. This understanding will likely help stop him from continually reverting back to the behaviour that is so damaging for him, without being such a specter looming over him that he can't function properly. The media can be a very strict task-master at times - so strict in fact, that it makes it impossible for anyone caught under the microscope to act naturally. Living in constant fear of judgment is not a very good way to change behaviour at all. A little of that can be good, because it provides a framework of consequences for one's actions, but too much can become overwhelming.