The Scorebook
Baseball Analytics 101: Statcast Terms Every Fan Must Know
Modern baseball is measured to the decimal. This guide translates the analytics age — exit velocity, launch angle, spin rate, WAR — into the plain language every fan needs.
Exit Velocity and Launch Angle: The Physics of Contact
Exit velocity measures how hard the ball leaves the bat; launch angle measures where it goes. Together they predict everything — a 110-mph, 28-degree launch is a home run in every park on earth.
You'll hear these numbers on every broadcast now. When the announcer cites exit velo, you'll know why the crowd gasped before the ball landed.
Spin Rate: The Pitcher's Secret
Spin rate — revolutions per minute — determines how much a pitch moves. High-spin fastballs appear to rise; high-spin curveballs break harder. It's the hidden variable behind every swing and miss.
The sticky-stuff crackdown made spin rates public drama. When a pitcher's spin drops suddenly, the broadcast notices — and now you'll know what it means.
WAR: One Number to Rule Them All
Wins Above Replacement compresses everything — hitting, fielding, baserunning — into one number. A 6-WAR player is a star; 8+ is MVP territory.
WAR isn't perfect, but it's the best single answer to 'how good is he, really?' In contract debates and Hall of Fame arguments, it's the number that ends discussions.
Frequently Asked Questions
What is exit velocity in baseball?
The speed of the ball off the bat in mph — the core Statcast measure of contact quality.
What does WAR mean?
Wins Above Replacement: a player's total value in wins versus a replacement-level player.
What is a good spin rate?
Roughly 2200+ rpm for fastballs is above average; elite curveballs exceed 2800 rpm.