A decision Zack Greinke hasn't even made yet had a heavy bearing on some of the biggest decisions the Dodgers' front office made this winter.Greinke can opt out of his original contract with the Dodgers after this season and become a free agent. The 31-year-old pitcher said Saturday at the team's FanFest he doesn't know what he'll do when the time comes, but the open market might make the decision easy.