This is Nate Freiman’s second post as part of his August residency. Nate is a former MLB first baseman. He also played for Team Israel in the 2017 World Baseball Classic and spent time in the Atlantic and Mexican Leagues. He can be found on Twitter @natefreiman. His wife Amanda routinely beats him at golf. To read work by earlier residents, click here.
Being a tall hitter came with its drawbacks. Long arms, lots of moving parts. Eight-hour bus rides starting at 11pm. Getting pitched inside. (In fairness, I saw thousands of pitches and only suffered two broken hand bones.)
And yes, the low strikes. My entire career, anytime I’d get a low strike called there would be someone from the dugout yelling, “He’s six-eight!” Hopefully, by that time, it wasn’t news to the umpire. My hitting coach in A-ball told me to wear my pants Hunter Pence style. Above the knees. He figured the umpire would see the bottom of the zone better. I figured that would get me ejected.
So I can honestly say I sympathize with Aaron Judge. Travis Sawchik has done great work on Judge’s relationship with the bottom of the zone. It makes sense that a guy that big is a strike zone anomaly, but do other guys have the same problem? I used Statcast data to investigate.
The MLB pitch data features anywhere between 50 and 90 columns of information for every single pitch thrown. One of them is “sz_bot,” or strike-zone bottom. I used this number to adjust the strike zone for each hitter. The problem is, sz_bot varies. Of the hitters who have seen at least 500 pitches in 2018, the top of the zone measurement (sz_top) has an average range of 2.8 feet, while the bottom of the zone (sz_bot) varied an average of 3.4 feet.
Most of this is due to random outliers. One of the columns for David Freese, for example, suggests his strike zone on one pitch extended up 11 feet. To address this, I took the median strike-zone top and bottom for each hitter instead of the average.
Once determining the approximate strike-zone boundaries for each hitter, I isolated somewhat arbitrary window at the top and bottom of the zone. The window at the top of the zone is simply every pitch that is coded as being at least half the diameter of the baseball above sz_top. The bottom window is every pitch located between half a ball below sz_bot and one foot below sz_bot. The batters receiving strike calls on these pitches are, in theory, those who are the greatest victims of low strike calls.
Most Called Strikes on Low Pitches, 2018
Not surprisingly, Judge is way ahead. In fact, there’s a statistically significant difference between him and Peralta, who’s still ahead of everyone else in baseball. These guys also happen to have an average height of 75.4 inches, or a little over 6-foot-3.
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