Probably in the top 3 best defenders in this league for me, if not the best. First name on team sheet going off ability.
However, the problem you have here if you are manager is a bit of a headache, especially if you have played the game and know how your average professional footballers brain works.
Everyone at the club was aware of the situation regarding Troy when Kav went in for him, he could be relied upon to play 1 game a week max, Troy was honest to say that as well. Kav thought he was worth it and give him the big contract and said to Troy you let me know how you are for the upcoming match, this could even be on the morning of the game. To be fair to Troy who would turn down the offer of a good contract and a manager who understands his knee would have to be managed. And for someone who does have injury problems no one could ever say he doesn't put his body on the line for the team when he plays, he is all or nothing and a class act as well.
I think the problem for the manager is that as mentioned, he can't train consistently, he doesn't know himself if he can play consistently, and sometimes he doesn't know until Saturday morning wether he will be involved. I have seen the stats above and people are right to say he is worth keeping, the thing is you want to ideally prepare your team from Tuesday onwards and know who is going to be playing as a manager, and certainly run through team shape Thurs/Fri. You cant really do this when you are waiting on this kind of decision. Also as a player you want to prepare all week and when you get the nod Thurs/early fri you go into that zone, its hard for players to be kept hanging waiting on the fitness of a player. And what about the players who are putting it in in training all week and still don't get in, a resentment would build and that's not good for the dressing room, its only natural it would if you are a determined pro. I'm just giving you an idea of what thinking maybe involved in these decisions. Yes we don't have many Sat/Tues games but having a settled back line is key. At the end of the day if Troy didn't have a problem he simply would not be at Carlisle United such is his quality. I don't envy managers at times like this!