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...the schmuck at Turner and Boston could also have been the league change to NL (getting used to a new league...even an easier one...can sometimes take a bit) and then mid-season trade...he may never have been all that comfortable with his playing time situation either. So there's that possibly working in your favor.
As for park split data...you poke around Baseball-Reference.com in the splits sections and add things up to get the numbers I post on park splits.