Let’s Get Small: Hundreds of Minor Leaguers Have Shrunk

Once all the blurbs for a prospect list have been written, I comb back through the giant spreadsheet that populates what readers see on The Board and double check its many fields for errors and inconsistencies. Two data points I’ve kept manually since 2017 are the heights and weights of the prospects who have passed through that space. At times, this has felt nonsensical — there are heights and weights on our player pages, and they could easily be pulled into the machinery that pumps out the tables that accompany the write-ups you see on our lists. But players’ measurables, especially in the minors, are often obviously wrong, and so for a little over a half decade, I’ve used my own judgment to make manual adjustments in cases when what is listed is clearly incorrect.
This has mostly meant manually adjusting players’ weights as they’ve gotten older and bigger, because even when players are on big league rosters, there is sometimes radical imprecision around their actual specs. When it comes to heights, however, I’ve overwhelmingly deferred to those on minor league player pages unless there was an egregious under-reporting (I think Oneil Cruz was the last one I manually fudged). Once the 2023 minor league season began, my pre-publication checks revealed a strange pattern: Many minor league players, mostly hitters, were suddenly listed on minor league player pages as being one or two inches shorter than my previous records indicated, and some of them had shrunk by as many as four inches.
While incorrect heights and weights are prevalent, widespread change to them across the entire player population was strange and struck me as probably having a cause. I’m going to show you the list of changes to players’ heights and go over potential explanations for how and why this has happened (and why so many heights were wrong in the first place), but first let’s talk about why this is an important detail. Read the rest of this entry »






