How big can baseball bats get?

Answer 1

A Baseball bat in Pro Baseball can be any size. But, it has to be -3. That means the weight of the bat has to be 3 below the width. (e.g. If the bat was 34 inches the weight would be 31 ounches)

It doesn't have to be minus three, if you are comfortable and strong enough, you can swing a bat that is minus 1 (ie: 35 inches in length, 34 oz, in weight) There are no regulations as far as length and weight, Tony Fernandez who used to play with the Blue Jays used a 35 inch bat, the only regulations are diameter of the hitting surface on the bat, and they are now researching new regulations into the Maple Bats because of their inclination to break into sharp shards of bat. (ie hitting with the face grain instead of the edge grain like with an ash bat, maximum grain slopes, handle thickness etc, ) but so far no new regulations yet, still a work in progress.

The Official MBL rules state it as such:

1.10

(a) The bat shall be a smooth, round stick not more than 23/4 inches in diameter at the thickest part and not more than 42 inches in length. The bat shall be one piece of solid wood.

NOTE: No laminated or experimental bats shall be used in a professional game (either championship season or exhibition games) until the manufacturer has secured approval from the Rules Committee of his design and methods of manufacture.

(b) Cupped Bats. An indentation in the end of the bat up to one inch in depth is permitted and may be no wider than two inches and no less than one inch in diameter. The indentation must be curved with no foreign substance added.

(c) The bat handle, for not more than 18 inches from its end, may be covered or treated with any material or substance to improve the grip. Any such material or substance, which extends past the 18 inch limitation, shall cause the bat to be removed from the game.

NOTE: If the umpire discovers that the bat does not conform to (c) above until a time during or after which the bat has been used in play, it shall not be grounds for declaring the batter out, or ejected from the game.

(d) No colored bat may be used in a professional game unless approved by the Rules Committee.