TwentySeven
Guides
Practical, no-nonsense guides to the things people actually struggle with — written to genuinely help, and to show you how TwentySeven makes each one easier.
How win probability works in baseball
6 min →Win probability is the one number that tells you not just the score, but each team’s real, live chance of winning the game — here’s how it’s calculated and how to read it.
What is leverage index in baseball?
6 min →Leverage index turns the vague feeling that “this is a big moment” into a precise number — here’s what it means and why managers plan around it.
What is WPA (Win Probability Added) in baseball?
7 min →Win probability added credits players for the wins they actually create, rewarding a two-out single that decides a game over four empty hits in a blowout.