MLB players are getting caught by new robot umps for lying about their height

From driver’s licenses to Tinder, there’s something about men lying about their height baked into the fabric our society — but only in MLB can it result in a competitive advantage, until now. Baseball is implementing its Automated Ball-Strike (ABS) challenge system this season, after undergoing a trial in 2025, and that means every player in baseball is getting accurately measured for the system, with some hilarious results.

We’re seeing a lot of players who claimed they were over 6’0 suddenly fall below the mark. Alex Bregman, who recently signed with the Chicago Cubs, has magically shrunk from six-foot, which he was listed as with the Houston Astros, to 5’11 with the Red Sox, now 5’10 in Chicago. Similarly Gavin Lux, previously a strapping 6’1 27-year-old, has now lost some inches as well.

This is happening because the league has to get accurate strike zone data for every single player, which means getting their full and accurate measurements. In order to do this they’ve needed to codify what the strike zone is across all of baseball, moving away from looser the interpretation of “top of the pants to the batter’s shoulders.”

Specifically, the strike zone is now defined as 17 inches across the plate for all players, but in terms of height the zone now starts at 27% of the player’s height, falling roughly around the waist of most players, and extends to 53.5% of the player’s height. MLB says this is a general reduction from umpire rulings, which they found averaged out to be 24.2% to 55.6% — which in turn means a smaller strike zone, and fewer strikes as a result.

Theoretically lying about your height in the past should have been a disadvantage, but umpires were paying attention to what they saw — not the figure on paper. If a ball went above your shoulders or below your belt it was a ball, regardless of the height ratios of players. Now that balls and strikes can be challenges thee has to be accurate measuring for the ABS software to work off.

Interesting MLB attempted to try and use a 3D model that turned the strike zone into a cube, but claimed it caused issues. Adding depth to the equation allowed pitchers to paint unnatural corners of the strike zone that ABS would have claimed was a strike — but didn’t make sense under the former understanding of the zone. So MLB scrapped the experiment and will instead use ABS on a 2D plane, much as we’ve come to understand the zone in the past.

Now you know why some of your favorite players might rock up at the plate seeming more like short kings that the strapping six-footers they’ve been claiming for years. Personally, as a sub-six foot man myself, just own it boys. Nothing wrong with being a little shorter — except when it comes to buying dress pants. Screw the inseam measurements of dress pants when you’re shorter.