Back to some RV100 (average run value compared to average of 100 pitches) leaders, this time by lateral slice.

"Fat" pitches are the middle ten inches of the plate, "Out" and "In" are the next 7 inches each, outside and inside relative to the hitter respectively, which along with the "Fat" slice comprise the 24-inch wide plate that best matches what's actually called in games.  "Wide" and "Tight" are off the plate, outside and inside relative to the hitter, respectively.

Here are the baseline RV100 numbers, across all PITCHf/x data going back to 2006.  I mean everything, including WBC, Futures Games, Exhibition, Playoffs and Regular Season.  Lower numbers are better for pitchers.

Wide   2.22
Out   -2.47
Fat   -2.55
In    -2.15
Tight  2.16

The stats below are from 2009 regular season games, up through May 14.  A minimum 71 pitches was needed to qualify for a slice, which made the qualifying group the Tight leaders rather small.