First round draft picks, you have to offer a contract. Which is pretty much a standard one, with a salary depending on the draft pick and +/- some percent depending on the negoating skills. The player is the only one who can say no, but he can not join a different NBA team them. The player need to accept the contract withim 2 season afaik. Second round draft picks, the drafting club got the exclusive ,right to negotiate with the player without limitations for the salary for the next 3 years. Both said prior draft that they want to play right away in the NBA if they get chanche, so if you don't want them don't draft them first round. Maybe at the end of the first round they might be situations, where it makes more sense to stay in europe for them since the salary difference is lower or maybe the salary is even higher in europe. Edit: thats why the Mavericks downtradet this draft, to get a sheeper salary instead of picking the best player avaiable and don't make him an offer in the first year if they could land on howard. The question for this thread who makes sense should be: Should we sign Muscala right away, or should we let him develop overseas?