From SABR member Cyril Morong at Cybermetrics on December 14, 2014:
98.7 is simple average of park factors for JoeD’s years, from Baseball Reference. Yankee stadium comes out at about an average park only because it favored lefties and killed RHBs.
Now let’s take a look at Yankee Splits from 1947-51 (I don’t think the Baseball Reference Play Index has much data on these breakdowns before 1947).
Yankee RHBs actually did just a bit better on the road (an OPS of .005 better). We see a drop off for their LHBs (OPS falls .019).
But opposition RHBs had an OPS that was .102 higher at their home parks than in Yankee Stadium.. For opposition LHBs it was only .047 better.
Read the full article here: http://cybermetric.blogspot.com/2014/12/do-park-effects-treat-dimaggio.html
Originally published: December 15, 2014. Last Updated: December 15, 2014.