2026 Official Rules of Softball
NON-APPROVED BAT: A bat that does not meet USA Softball specifications or is on the current USA Softball non-approved bat list with USA Softball Certification Marks.

SOFTBALL OFFICIAL RULES OF - static.wbsc.org
eserved. This Rulebook contains the Official Rules of Softball (“Official Rules” or “Rules”), adopted by and of the World Baseball Softball Confederation (“ BSC”). The Rules govern the playing of Fast Pitch and Modified Fast Pitch Softball in any game, tournament or competition, whether or not a WBSC Com.

OFFICIAL RULES OF SOFTBALL
The Coefficient of Restitution of a softball when measured with the ASTM (American Society for Testing and Materials) test method for measuring the Coefficient of Restitution of softballs.

SOFTBALL
USA Softball remains one-of-a-kind in the opportunities we provide. Whether you compete or play for fun, whether you’re eight-years old or eighty, whether it’s fast pitch, slow pitch or modified pitch, there is a place for you in the USA Softball family.

PERFECT GAME OFFICIAL SOFTBALL RULEBOOK
PERFECT GAME SOFTBALL NATIONAL ADMINISTRATION TEAM Destinee Martinez National Director of Softball Operations

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