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My understanding is...you regress the small split toward the big one a heck of a lot more than you regress the big split to the small. That must be right. It will be much easier for Guti to raise or lower his vL split because he has less than 40% of the total chances there that he has against righties.
4 years of Guti hitting righties at a .262-.309-.372 clip (his vR line in '09, his break out year) to raise his career avg/OBP/slg 8 pts each!
His career vR #'s aren't going anywhere fast.
moe