The Leak
Our most important model feature turned out to be a data leak — quietly making the model look smarter than it actually was. Here's how we caught it, why we rebuilt the model clean and shipped it this week, and why we're telling you about a mistake no user would ever have seen.
June 24, 2026
model integritydata leakagetransparencymodel calibrationBayesian methodsbaseball analyticsmachine learningmodel development