When I got curious how something worked or needed to understand a concept to build the models, I wrote it up. These are those explanations.
Gradient-boosted trees from scratch — the core algorithm powering every pitch grade.
How batters adjust through the order — the times-through-the-order effect and what it means for pitcher evaluation.
How travel distance, time pressure, and turnaround windows affect reliever pitch quality — and why starters are immune.
