What is a torpedo bat? Inside MLB's next big thing - ESPN

EARLY IN THE 2023 season, Aaron Leanhardt started asking New York Yankees hitters what they needed to perform better. He was a minor league hitting coordinator for the team, and with league-wide batting average the previous year at its lowest point in more than a half-century, Leanhardt approached that spring with a specific question: How, in an era ruled by pitching, could offense keep up?

«Players were frustrated by the fact that pitching had gotten so good,» Leanhardt said.

An MIT-educated physics professor at the University of Michigan for seven years, Leanhardt left academia for athletics specifically to solve these sorts of problems. And as he spoke with more players, the framework of a solution began to reveal itself. With strikeouts at an all-time high, hitters wanted to counter that by making more contact. And the easiest way to do so, Leanhardt surmised, was to increase the size of the barrel on their bat.

Elongating the barrel — the fat part of the bat that generates the hardest and most contact — sounded great in theory. Doing so in practice, though, would increase the weight of the bat and slow down swing speed, negating the gains a larger sweet spot would provide.

Leanhardt started to consider the problem in a different way. Imagine, he told players, every bat has a wood budget — a specific amount of weight (usually 31 or 32 ounces) to be distributed over a specific length. How could they invest a disproportionate amount of that budget on the barrel without throwing off the remainder of the implement?

The answer led to what could be the most consequential development in bat technology since a generation ago when players forsook ash bats for maple. The creation of the bowling pin bat (also known as the