Analysts and researchers
Every pitch and plate appearance, with context
Pitch type, velocity, location and count for every pitch; base-out state, batted ball and RE24 for every plate appearance.
Pitch-level research usually starts with stitching scraped files together.
The join is the work. The question is what you wanted to answer.
What to build
A pitcher's arsenal
Usage, velocity, whiff rate and ball rate per pitch type for any pitcher and season, then every pitch behind it.
Context-aware hitting
RE24 credits the situation: rank hitters by runs added, then pull the plate appearances that made the number.
Where hitters hit it
Balls in play by field and trajectory, with every ball's location for a spray chart.
What it will not do
- Seasons from 2015; every pitch from 2018, about 98 to 99% of each season's pitches in 2015 to 2017.
- Pitch type and velocity are on 96% or more of each season's pitches, and 99.8% or more from 2020.
- Batted-ball location is a field-diagram point and trajectory, not measured exit velocity or launch angle.
- Win probability on plate appearances from 2019.
Worth reading first
Start with 500 free credits
No card. REST or MCP.