Only bats that are allowed are bats that meet MLB specifications. 

No composite bats, bamboo bats, aluminum bats or bats of any other material are permitted.*

*Subject to change in upcoming seasons. We understand that composite wood bats are safer, more price savvy for players, and do not have any greater sweet spots than regular wood, but wood bats are how we have always played the game and we feel it is a tradition we are not ready to change at this time.