Rules
The Interleague Girls Softball Playing Rules will follow the USA Softball (formerly known as ASA) rule book for the 2026 season. The documents below outline agreed upon amendments, exceptions and/or clarifications which all leagues playing games with OGSL teams agree to follow.
For the 2026 season, the major rule changes for OGSL are that defensive face masks are required for all pitchers and that playing time requirements have been established. For 12/14U, time limits have changed for games with Castro Valley.