Midseason pitch changes mostly stick. Lost fastball velocity mostly doesn’t.
When a pitch’s velocity or movement changes during the season, how much is still there the next spring? Movement changes hold; fastball velocity losses mostly come back.
Sports analytics with the data out in the open.
Sparvi publishes analysis meant to change a decision, not just describe a game. Every finding comes with the data behind it, in an explorer you can filter and search, so you can check it yourself or come to a different conclusion.
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Baseball · Tool
Stuff+ leaderboard
Every MLB and Triple-A pitcher and pitch in 2026, graded on velocity, movement, and release alone.
Baseball · ToolTriple-A explorer
Swing decisions, contact quality, and pitching profiles for every Triple-A player, with league percentiles and recent changes.
ReferenceGlossary
What every number on the site means and how it's calculated.