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MLB Unveils New Height Rules for Player Measurements

3/21/2026

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Summary

Story summary

Major League Baseball (MLB) is implementing new height-measurement rules under the Automated Ball-Strike Challenge System (ABS).
The changes can create discrepancies in reported heights, such as Rays infielder Gavin Lux listed at 5 feet 11 inches.
The process requires no hats or shoes and measures players between 10 a.m. and 12 p.m.
Each ballpark will have a measuring device for players called up, with results in fractions of a centimeter.

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Story summary

Major League Baseball (MLB) is implementing new height-measurement rules under the Automated Ball-Strike Challenge System (ABS).
The changes can create discrepancies in reported heights, such as Rays infielder Gavin Lux listed at 5 feet 11 inches.
The process requires no hats or shoes and measures players between 10 a.m. and 12 p.m.
Each ballpark will have a measuring device for players called up, with results in fractions of a centimeter.