Mats is where he is b/c his team, Seibu, posted him. Had the team not done that, he would be pitching for Seibu at least one more year (if Seibu posts him next year) and possibly 2 more yrs at a salary around $2-3mil/yr before he is eligible to sign with a ML team as a FA. So in a sense Mats owes Seibu the favor of signing so Seibu gets the posting fee. As Vance stated, he is not a FA, he/his agent are not bidding against other teams, and Boston did pay an exorbitant amount for the right to negotiate for his services exclusively. He has never pitched a single ML inning, and if he does not sign and goes back to Japan for another yr or 2 and gets a severe or career ending injury or his skills decline, he may never throw a ML pitch. And, Boras will lose the commission. Lastly, not signing means Boston is off the hook for the posting fee. In this negotiation, Boston is clearly in the driver's seat.