Baseball · Rules and guides
Baseball scoring rules and guides
Guides to keeping a baseball score and the rules behind it: when a run counts, how innings and extra innings work, how many innings a youth game lasts and when the mercy rule ends a game early.
Baseball has one way to score, the run, worth 1, and a tie after the last inning goes to extra innings. Start with how to keep score in baseball: when a run counts, how to read the R/H/E line score, walk-offs, scorebook basics and a full game scored run by run.
Then go deeper where you need it. The mercy rule by league puts Little League, Babe Ruth, high school, college and international run rules side by side. Little League innings by division runs from Tee Ball to Senior League, including what happens after a tie. Wiffle ball rules covers the official rules, ghost runners and backyard scoring.
Each page lists the rulebooks it draws on, such as MLB's Official Baseball Rules and Little League's rules and regulations. To keep score during a game, the baseball score tracker app adds a run with one tap and moves through the innings with a Next inning button.
Scoring guides
Formats and variations
Last reviewed September 25, 2026
Keep score with one tap.
Sport Score Tracker keeps baseball score on iPhone and Apple Watch, so you can play instead of counting. Offline, no ads, no account.