The Anatomy of a Slump: What Eleven Straight Losses Actually Tell You
Four teams hit the skids in July — the Marlins lost eleven straight, the first ten all by three runs or fewer — so we decomposed every slump and then backtested 491 of them from 2021-2025 to ask what a slump predicts about the next 30 games. Almost nothing: no detail of the slump (depth, luck, close losses, bullpen form) adds any out-of-sample power beyond season record and season xwOBA differential, a null that survived an independent 33-feature machine-learning attack. Close losses predict nothing. 'They're due' predicts nothing. The famous streak cliff is mostly survivorship arithmetic — controlled for who's playing, streak length adds no resolvable next-game effect, just a small monthly drag. One signal survives: cold bats revert. Forecasts for all seven July slumpers are on the record, with honest bands, graded publicly in 30 days. Miami: .48, band .44-.52.