This will probably earn negative props, but it's the truth: substance abuse. Everyone needs to stop thinking about it like he has a choice, or like it's a sprained kneee. It's a substance problem and he needs to clean up. Props for dealing with it. To all the pinkbike kiddies that don't understand, or blame work ethic or whatever, just cut the dude some some slack and let him straighten out his life. Even if you can't understand how people get into this situation, some people eventually end up there. Again just cut him some slack. This isn't like bouncing back from a injury.