So what would they do with him? Sack him? They have no doubt been trying to get him fit - the quickest way to do it being getting him playing regular football.
Nobody knows whats going on behind the scenes, but the performances he's put in dont lie. People are so loathe to believe that its the players fault and that he isnt pulling his weight (no pun intended) but the evidence suggests otherwise. Bottom line is not all people are natural athletes, nor do all professionals live a "professional" lifestyle.
I know a little bit about losing weight and being fit, and it takes a lot of hard work - but getting your diet right is 80% of the battle. It's not hard to see how a young lad who has previously not had any issues and been able to eat what he wants and stay lean gets injured and puts on a few pounds - from there, unless you get wise and start knuckling down its easy to spiral - i.e. you cant get a run of games because you arent fit, but you cant get fit because you need a run of games. Its a vicious circle.
Bottom line, whatever has gone on, or why - his perfromances are not up to scratch, and it looks as if he isnt doing enough about it.