Baseball Bat

Lore & Background

The bat's form has become more refined over time. In the mid-19th century, baseball batters were known to shape or whittle their own bats by hand, which resulted in a wide range of shapes, sizes, and weights. For example, there were flat bats, round bats, short bats, and fat bats. Earlier bats were known to be much heavier and larger than modern regulated ones.

During the 19th century, many experimental shapes and handle designs were tried. Modern bats are much more uniform in design. On June 17, 1890, Emile Kinst received U.S. patent 430,388 for the ball-bat, or banana bat. The mushroom bat was made in 1906 by Spalding.

The Wright & Ditson Lajoie baseball bat had a normal size barrel but had two knobs on the handle. In 1990, Bruce Leinert came up with the idea of putting an axe handle on a baseball bat. In 2025, the New York Yankees popularized a 'torpedo bat' design, which was made to increase contact hitting. The bat was designed by Aaron Leanhardt, a field coordinator with the Miami Marlins. Honus Wagner was the first player to endorse and sign a bat.

Reader's Guide

A baseball bat is divided into several regions. The 'barrel' is the thick part of the bat, where it is meant to hit the ball. The part of the barrel best for hitting the ball, according to construction and swinging style, is often called the 'sweet spot.' The end of the barrel is called the 'top', 'end', or 'cap' of the bat.

Opposite the cap, the barrel narrows until it meets the 'handle', which is comparatively thin, so that batters can comfortably grip the bat in their hands. Sometimes, especially on metal bats, the handle is wrapped with a rubber or tape 'grip'. Finally, below the handle is the 'knob' of the bat, a wider piece that keeps the bat from slipping from a batter's hands. The 'bat drop' of a bat is its weight, in ounces, minus its length, in inches.

For example, a 30-ounce, 33-inch-long bat has a bat drop of minus 3 (30 − 33 = −3). Larger bat drops help to increase swing speed, due to less mass per unit length; smaller drops create more power, due to greater momentum to transfer to the ball. Baseball bats are made of either hardwood or a metal alloy (typically aluminum). Most wooden bats are made from ash; other woods include maple, hickory, and bamboo.

Hickory has fallen into disfavor over its greater weight, which slows down bat speed, while maple bats gained popularity following the introduction of the first MLB-sanctioned model in 1997. The first player to use one was Joe Carter of the Toronto Blue Jays. Barry Bonds used maple bats the seasons he broke baseball's single-season home run record in 2001, and the career home run record in 2007. In 2010, the increased tendency of maple bats to shatter caused Major League Baseball to examine their use, banning some models in minor league play.

Manufacturers position each bat's label over the mechanically weaker side of the wood. To reduce chance of fracture, and maybe deliver more energy to the ball, a bat is intended to be held so the label faces sky or ground when it strikes the ball during a horizontal swing. In this orientation, the bat is considered stiffer and less likely to break. Different types of wood will fracture differently.

For bats made of ash, labels will generally be where the grain spacing is widest. For maple bats they will usually be positioned where grain is tightest.