Just out of curiousity as I have no idea, how long does a proper rehabilitation program take and how long would it be until Roberts is back and fit enough to regain his place in the team? Is this season out of the question?
As with any addiction, every case is different, but ballpark figures.. two weeks to 'dry out', then two weeks to 'adjust' (4 weeks rehab).
Then ongoing counselling to work through why/if you have an addictive personality, other issues etc.. And get to the root of the problem. Basically, digging up the crap in your life, whether it's from many years ago or something more recent. Not a nice experience!
This bit is done out of rehab, whilst getting back to a 'normal' way of life.
9 months in the case of my, er, mate :--
As I say, It's different for everyone, and Roberts has the added pressure of getting match fit afterwards.