I was surprised that pitch was a strike.
Does the zone change vertically to assess "knees to armpits" (or whatever the official zone is) when Fred Patek follows Frank Howard in the lineup?
Writeup
over here, but they definitely have different zones. There are multiple options for how to set those zones that they're playing with: the Hawk-Eye system includes skeletal tracking to follow a player's height and crouch in real time. They can use that data to set a zone based on the batter's stance, or they can just set the zone to standard percentages based on the batter's height. AAA is doing the latter this year, Florida State League the former. Presumably they'll evaluate which is better after the season.
Also of note: the zone being used is a two-dimensional rectangle at the midpoint of the plate The width used varies between the leagues (it was narrowed for AAA last year to the actual home plate width, after making it a bit wider last year resulted in a ton of Ks).
The strike zones for Triple-A and the Florida State League will be different. In Triple-A, the strike zone will be 17-inches wide (the width of the plate) with a two-dimensional rectangle at the midpoint of the plate. The top and bottom of the strike zone will be set at 53.5% and 27% of the batter’s height. While the width and bottom of the zone are the same as last year, the top of the strike zone has increased by 2.5%.
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In the Florida State League, the zone will be quite different. Most importantly, the width of the zone in the FSL will be 20 inches (three more than in Triple-A). Like Triple-A, it will be measured as a rectangle set at the middle of the plate.
The top and bottom of the zone will use the Hawk-Eye visual tracking system. The bottom of the zone will be set to the height of a hitter’s back knee, while the top of the zone will be set based on the midpoint of a batter’s hips, with the goal of making the top of the zone equal to one baseball above a batter’s belt. If a hitter’s stance changes, the strike zone will change as well, but it will be based on a rolling median of the hitter’s stance on previous pitches that have been put in play. So a hitter who tries to manipulate the zone by taking pitches but not swinging from an exaggerated crouch will not be rewarded.