MBL Bat Rules

* All bats must have the USA or USSSA stamp (unless using a -3 BBCOR stamped bat or wood bat).
* 15AA and 15AAA must use a BBCOR stamped bat or a wood bat.
* All levels besides 15AA/15AAA may use a BBCOR -3 bat.
* Any bat with a USA or USSSA stamp that has been deemed illegal via publication by the manufacturer based on subsequent testing is also illegal in MBL league play.

9-11U

Barrell: 2 ¾” or less  /   Weight differential: Unlimited

12U & 13U

Barrell: 2 1/4" or less with UNLIMITED weight differential or

Barrell: 2 ¾” or less  /   Weight differential: -10

14U & 14/15A

Barrell: 2 ¾” or less  /   Weight differential: -5

15AA and 15AAA

BBCOR stamp with -3 differential.