[Ditto]

In the bigs, a ball can come off the bat at 90+mph. An aluminum bat could add up to 20(!)mph to that!

With wooden bats, big league batters can hit the ball at up to 120+ mph (exit speed). So add 20 mph to that if they used aluminum.

[jjotto]

Aluminum bats are dangerous enough that they’ll likely be replaced by closely controlled composites even down to Little League.