Im pretty sure that's not quite true as Silvestor & Cartledge will both be too old for the rookie list next year. They will both also have been on a rookie list before so aren't eligible for the mature rookie list either.
Cartledge was on Essendon's senior list for 4 years (pick 28 in 2002) for 7 games. Under the current rules (which stopped Richmond from mature age rookie listing James Podsiadly because he had been previously rookied at Ess and Coll, even though he played zero senior games) this is Cartledge's first and last year as a rookie.
I don't think Silvester has been at another AFL club. If that's the case, he is eligible to be a mature age rookie next year (max of one per club).
For the reasons already put forward in this topic, plus he was first ruck for the Victorian VFL team, I'd vote for Cartledge to be promoted if anyone is going to be.
I'm hoping Collard gets another go on the rookie list next year. I think if he gets it all together that he can be something special.