Speed has always been one of baseball’s sneakiest weapons.
Bill James developed Speed Score to compare runners by blending stolen-base skill, triples, and the knack for crossing home.
This quick calculator lets you plug in a player’s season totals and see his Speed Score instantly.
Whether you are scouting fantasy free-agent steals or just curious about a prospect’s wheels, crunch the numbers below and judge the jets.
Speed Score Calculator
Speed Score Calculator FAQ
What is Speed Score?
Speed Score is a composite statistic created by Bill James that grades a player's overall running ability on a 0-10 scale.
Which seasons does this calculator work for?
You can use any season or career totals, as long as you have stolen bases, caught stealing, triples, plate appearances, and runs scored.
What if a player has zero stolen-base attempts?
The formula assigns a stolen-base percentage of zero, which lowers the final Speed Score.
All other components still contribute.
How reliable is Speed Score for fantasy projections?
Speed Score is descriptive, not predictive.
It can flag players with usable wheels, but aging curves, playing time, and team strategy also matter.
Does Speed Score correlate with Statcast sprint speed?
There is a moderate relationship.
Sprint speed measures raw velocity, while Speed Score also rewards in-game usage such as steals and triples.