BURKE, Va.— Behind a Kohl’s, in a lot brimming with scattered businesses, brews one of baseball’s biggest potential revelations in the world of wearable technology. His phone buzzing already, Steve Johnson is waiting, sitting at a small round table in his office, apologizing for how cold this baseball facility is.



“I got here early to turn the heat on for you,” Johnson said.



Here is the Advanced Baseball Training and Performance Center, his home base, though it hasn’t been much of a home lately. There was Florida and then Arizona, a half-dozen major league camps and counting. Another trip out west looms. When Dr. Greg Rose, the co-founder of Titleist Performance Institute (TPI), agreed to bring his state-of-the-art 3D motion capture to baseball, Johnson thought they’d start small.



Rose, already a pioneer in the golf world, thought differently. What if they took this technology to the toughest audience possible? The...