Rules

Official Rules of Softball

Stay on top of the game by learning the official rules of softball for the game that you are calling. “Call the code of the hat you’re wearing!” 

Keep up to date with the most current rules by checking out the following pages:

    USA Softball

     

    NFHS

    The National Federation of State High School Associations (NFHS) governs all school ball games.

     

    WIAA

    WOA Discriminatory / Harassing Behavior Policy

    The following NFHS rules have been modified and approved by league adoption.

    WIAA High School Rules Modifications

    • 2025-26 Handbook (see section 43.0.0)
    • 10 run rule after 5 innings (43.4.1.4)
    • On-Deck Batters: For the 2026 season, an on-deck batter may use whichever warm-up circle positions them behind the batter, regardless if they are a KingCo school. Players always have the right to use their own team’s warm-up circle; they are not required to move.
    • Tie-Breaker Procedure: The WIAA has not adopted a specific procedure for resolving tied games. That means it is up to each league. In the absence of a league rule, the game should continue in regular fashion until a winner is decided.

    KingCo High School Rules Modifications

    Adult Slow Pitch Leagues
    NCAA

    Remember that all community college games are called by NCAA rules. Use the links below to keep up to date on all NCAA rules and mechanics.

    Click here to see the differences between USA Softball, NFHS, and NCAA rulesets.

    Here are some magic phrases that might help your game management. Remember, though, the more concisely and accurately you can quote the rule book, the more grounded your conversations with coaches will be.