225 of 430 MLB hitters shrunk in height

onewoof

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Mar 4, 2008
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Thanks to the institution of the ABS pitch challenge system in Major League Baseball this season, 225 of the 430 hitters listed on Opening Day rosters are now listed at shorter heights than they were in 2024 and 2025.

According to Sam Blum of The Athletic, six players saw their official heights drop by three inches, 48 by two inches and 171 by one inch.

Meanwhile, 45 hitters gained one inch and two hitters gained two inches of height in MLB's effort to institute the most accurate strike zones possible.

Per Blum, close to 20 feet in height was collectively lost by MLB players during the transition, which equates to roughly "three full Aaron Judge-sized human beings."

The 6'7" Judge, who is a New York Yankees superstar outfielder and the two-time reigning American League MVP, was among those not impacted by the height changes.
Several prominent MLB players did see their official heights drop by at least one inch, though, including Toronto Blue Jays first baseman Vladimir Guerrero Jr., Los Angeles Angels outfielder Mike Trout, Philadelphia Phillies first baseman Bryce Harper, Seattle Mariners catcher Cal Raleigh and New York Mets outfielder Juan Soto and shortstop Francisco Lindor.

According to Blum, the players now listed at 5'11" lost an average of 0.82 inches of height during the changeover, which is the most of any height. That is followed by 5'9" hitters, who lost an average of 0.81 inches.

With 74 players listed at 5'11", it is now the most common height among hitters in Major League Baseball, followed by 72 hitters who stand exactly 6 feet tall.

The changes speak to the notion that some players may have previously lobbied to be listed at 6 feet even though they didn't quite make the cut.

Los Angeles Dodgers shortstop and 2025 World Series hero Miguel Rojas confirmed as much to Blum, saying, "I always pressed the guys who did the measurement to leave me as 6 feet. Because I was like, 'I'm so close to being 6 feet. What can we do? What can we do to put me at 6 feet?' I think it's better optics."
 
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HotMop

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Season 18 Episode 13 GIF by The Simpsons
 

Perd Hapley

All-American
Sep 30, 2022
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Thanks to the institution of the ABS pitch challenge system in Major League Baseball this season, 225 of the 430 hitters listed on Opening Day rosters are now listed at shorter heights than they were in 2024 and 2025.

According to Sam Blum of The Athletic, six players saw their official heights drop by three inches, 48 by two inches and 171 by one inch.

Meanwhile, 45 hitters gained one inch and two hitters gained two inches of height in MLB's effort to institute the most accurate strike zones possible.

Per Blum, close to 20 feet in height was collectively lost by MLB players during the transition, which equates to roughly "three full Aaron Judge-sized human beings."

The 6'7" Judge, who is a New York Yankees superstar outfielder and the two-time reigning American League MVP, was among those not impacted by the height changes.
Several prominent MLB players did see their official heights drop by at least one inch, though, including Toronto Blue Jays first baseman Vladimir Guerrero Jr., Los Angeles Angels outfielder Mike Trout, Philadelphia Phillies first baseman Bryce Harper, Seattle Mariners catcher Cal Raleigh and New York Mets outfielder Juan Soto and shortstop Francisco Lindor.

According to Blum, the players now listed at 5'11" lost an average of 0.82 inches of height during the changeover, which is the most of any height. That is followed by 5'9" hitters, who lost an average of 0.81 inches.

With 74 players listed at 5'11", it is now the most common height among hitters in Major League Baseball, followed by 72 hitters who stand exactly 6 feet tall.

The changes speak to the notion that some players may have previously lobbied to be listed at 6 feet even though they didn't quite make the cut.

Los Angeles Dodgers shortstop and 2025 World Series hero Miguel Rojas confirmed as much to Blum, saying, "I always pressed the guys who did the measurement to leave me as 6 feet. Because I was like, 'I'm so close to being 6 feet. What can we do? What can we do to put me at 6 feet?' I think it's better optics."
I’m kind of confused as to why height is even important for the ABS system. Batting stances and biometrics are variable for players that have the same height. And to a lesser extent they are even variable for the same hitter in the same at-bat, from pitch to pitch.

Strike zone vertical range is, by rulebook definition, the hollow below the kneecap to the midpoint of torso as viewed from the rear. Whether hitters are long waisted or long legged, how much they crouch, and so forth is relevant. Overall height is not. ABS system should be able to set that zone exactly based on those biometrics, and reset it every single pitch. And it should be able to do that just as easily for a random dude pulled out of the stands as it does for a 15 year MLB vet. I guess without researching it too much, I thought that capability was already there. If it isn’t, I’m not sure it should be used until it is….or it won’t be long before they figure out how to game the system.
 

Perd Hapley

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Sep 30, 2022
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Height is the best metric. If it varies by stance, players will just squat like they are a catcher and challenge every strike call.
The current rulebook states what the zone is at all times. If what you suggest above is a problem, it would have also been an issue with human umpires, too. The ABS has to be capable of adhering to the rulebook. If it isn’t, the rulebook has to be updated to reflect the new standard reflecting biometric data basis for the zone or whatever. Maybe it has been, I don’t know, but it doesn’t seem like it from some quick googling.

Furthermore, at the MLB level, pitchers are still going to be able to hit that shrunken zone very consistently, even if its only 6” high. A hitter crouching like a catcher to try and game the system is going to be completely helpless at hitting anything. It’s a total gift to the pitcher to do that, which is why it hasn’t happened already.

If there’s still somehow a concern, you can perhaps set a “minimum zone” of like 30”~45” off the plate or something, and have ABS apply whatever zone is the largest between that and the real-time zone based on scan of that exact hitter (at the exact point in time the pitcher comes set) just to prevent manipulation. But I don’t think this is really necessary, and you really don’t need height data in order to do this, either.
 

Dawghouse

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The bottom of the zone is a percentage of the players height, same for the top. Main problem they had in the minors was the AND followed the rules and the zone was completely different from "normal". They wanted the zone to match what everyone was accustomed to and thus the percentages.
I've always thought the top of the zone wasn't high enough based on "the rules", turns out they were just ignoring the rules forever.

as long as everyone knows the rules and they are followed consistently, it'll be great. So far I like it. We could have benefited from computer calls last night.
 

Perd Hapley

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Sep 30, 2022
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The bottom of the zone is a percentage of the players height, same for the top. Main problem they had in the minors was the AND followed the rules and the zone was completely different from "normal". They wanted the zone to match what everyone was accustomed to and thus the percentages.
I've always thought the top of the zone wasn't high enough based on "the rules", turns out they were just ignoring the rules forever.

as long as everyone knows the rules and they are followed consistently, it'll be great. So far I like it. We could have benefited from computer calls last night.
So to be clear, they are using just one zone for every player and every pitch? Because that’s pretty messed up, if true.
 

QuaoarsKing

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Mar 11, 2008
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So to be clear, they are using just one zone for every player and every pitch? Because that’s pretty messed up, if true.
No, it's the opposite. Assuming the article I read was accurate, every player's strike zone is is 27% to 53.5% of their official height, which has to be reported accurately.

You could argue that not everyone's knees are in the same proportion to their overall height, but I think I'm OK with that distinction.
 

Perd Hapley

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Sep 30, 2022
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No, it's the opposite. Assuming the article I read was accurate, every player's strike zone is is 27% to 53.5% of their official height, which has to be reported accurately.

You could argue that not everyone's knees are in the same proportion to their overall height, but I think I'm OK with that distinction.
I mean, it seems like that might be a bit of a problem? Aaron Judge is 79 inches tall. 53.5% of that is 42”. That might barely be belt high for him (if that). A ball at the bottom of the rib cage should be a strike every time. For him, it’s gonna be a ball every time. And yes, I get that it might be a perceived disadvantage for him that he’ll have to reach farther for the low strikes and some may think that cancels it out, but that can easily be compensated by just using a longer bat.

Seems that pitchers are going to be getting squeezed every time against the best hitter in baseball. And, taller players in general are going to have a big advantage under this new set up.
 
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