Normalized Strikezone Map

How To Read These Graphs

These graphs only plot calls made by the home plate umpire. In other words, they only plot balls and called strikes. No other pitches or results are included. Intuitively, this provides a representation of the strikezone for each game.

Each pitch is represented by a single dot. Green dots are balls and red dots are strikes. Pitches marked as belonging to a particular team (for example "bos" or "nya") are designated with different shapes. These teams represent the pitching team, not the batting team. So, a pitch marked "bos-Called Strike" was thrown by a Boston pitcher.

As is indicated on the graphs, these are from the Umpire's perspective, not the Pitcher's perspective.

Normalized maps attempt to correct the Y-Axis on this graph by using the sz_top and sz_bot values in the PitchFX data for any individual hitter. These parameters are variable and should not be taken as gospel (or any other works of Holy Writing, including Torah or Qu'ran). These values are then scaled to 1 and -1 respectively. The outside edges of the strikezone are then drawn to specifications corresponding to an average umpire's strikezone.

Non-Normalized maps simply use the actual height of each pitch as it crosses the plate. But, because of variable batter height, this may not provide a completely accurate picture of an Umpire's Strikezone in the Vertical Axis. The outside edges of the strikezone are then drawn to specifications corresponding to an average umpire's strikezone.



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