With the new standards set by the USA Baseball, the governing body for this sport, major youth baseball leagues have started adopting a new method for measuring bat performance in the testing of youth bats since 2018. This law specifically says that no bats previously approved for use in the Little League play, meaning Junior League Baseball and below, will be allowed for use in any Little league game or practice. That includes Little League activity, event or function. Since then, all bats must be marked with the USA Bat label so that it can be used in Little League Baseball. The question now is, "Which bats are in the best USA Baseball bat