New bat rules applied to Baseball only as of the 2018 season. Softball bat standards did not change. Any non-wood bat used prior to the 2018 season is no longer permitted for use in Little League baseball games or practices.
All bats used in Little League baseball games or practices must have the USA Baseball mark. One-piece wooden bats without a mark are permitted.
Visit the Little League Baseball Bat Information page for more detail on the new standards and the rationale behind.