At Jeremy LeBlanc’s 50-and-up amateur baseball league game in North Carolina last weekend, one topic dominated the dugout conversation: the “torpedo bats” that had suddenly taken over the sport.

And it’s not the first reinvention of the baseball bat, as Marucci designed the “puck knob” just a few years ago. “We created a puck knob here in this lab for Paul Goldschmidt ...