First time I noticed this thread. In all honesty I doubt that books adjust lines because of who is umpiring. For one thing for the first game of a series there is really no way of knowing who will be behind the plate until close to game time. With games that have notorious over or under umps known well before hand (2nd or 3rd game of a series etc.) the line will adjust itself when the original number is offered to the "sharps" who get to bet into to a line before it goes public.
wil.
wil.
