Beginning with 2009 Little League Baseball season, baseball bats with a diameter of 2 3/4-inches are no longer permitted for use in the Junior League Division of Baseball.

Baseball bats with 2 5/8-inch diameter are now standard for all teenage baseball divisions (Junior, Senior and Big League).

The "minus-3" requirement - overall weight (in ounces) of a bat can be no more than three ounces below the overall length (in inches) of the bat - remains in effect in Senior and Big League Baseball divisions, but is NOT a requirement in Junior Baseball.

In effect for the 2009 season is requirement that all non-wood bats used in Little League Baseball Divisions, and below shall be printed with BAF (bat performance factor) of 1.15 or less.