That is taking punitive action far in excess of what is suitable for recreational fantasy leagues. I see no reason for them to penalize you, who drafted and used Melky without any intended wrong doing. If this kind of penalty was not written in the league rules beforehand, it should not be done after-the-fact. Major League Baseball did not penalize the Giants by subtracting Melky's wins above replacement or win-shares, and neither should your league penalize your team. You are welcome to share this comment with your league.