Sydney signed him up for a couple of extra (very lucrative) years on top of his rookie deal because GWS was trying to poach him by getting him to nominate for the draft instead of going father/son.
Edit: Though to be fair, he's listed as 2014 on your own board.
Haha yeah same thing happened in 2012 with Kennedy.
Numerous articles have come out over the last couple of weeks mentioning all our players off contract and Mitchell has not been named.