Before joining the Marlins, Leanhardt worked as a major-league analyst for the Yankees. Per a profile by The Athletic, Leanhardt began work on the "torpedo bat" in 2022 while a member of the Yankees' minor-league hitting department. Now the "torpedo bat" is the biggest story in baseball and one of the biggest stories in sports.

The person holding court for Monday afternoon’s largest media scrum wasn’t superstars Juan Soto or Francisco Lindor, but newly nicknamed “El Torpedo.” Aaron Leanhardt, the Marlins’ unassuming field coordinator,

MIT graduate is physicist credited with creation of torpedo bat. Former Yankees analyst now employed by the Marlins as a field coordinator.

Major League Baseball certainly isn't struggling for storylines as it begins its 2025 season, as the introduction of a new "torpedo" bat has rocked the

Miami Marlins field coordinator Aaron Leanhardt is the architect behind the New York Yankees' famous "torpedo" bats that caused a media frenzy.

But the development of the uniquely shaped piece of lumber — it looks more like a bowling pin than a traditional bat, with a thicker middle and tapered end — wasn't the result of a life spent around the game. Instead, it was the application of skills and knowledge that he cultivated in higher education.

There have many reports recently about a new trend that has started making waves in Major League Baseball (MLB): the torpedo bat.

The man behind the design is Aaron Leanhardt, who has all of a sudden become the most popular figure with the Miami Marlins. A field coordinator and coach or the Miami Marlins, Leanhardt's journey to the top of the MLB headlines is arguably more interesting than the adjustments he helped make with the torpedo bat.

Jazz Chisholm Jr., who is using the model, described the thinking on social media as, “[Y]ou just move the wood from the parts you don’t use to the parts you do.”