The players who are uncontracted but on the teams list before the the november national draft, cannot enter the draft but may enter the pre-season draft. The pre-season draft originally was in February and all contracts expired on the 31st of December. The AFL just moved the draft so players could do pre-season training with their desired clubs. The teams can also nominate players they are drafting in the pre-season draft provided the teams before them don't object to their selection. Hudson has requested to be traded to WB but if his trade does not eventuate WB has pick 4 in the pre-season draft, if Richmond, Carlton and Melbourne specify they will not draft him he can sign and train with WB after the November National draft, unless Adelaide delist him before the draft then any team can draft him with their picks.