Four months after being announced, so-called “robotic umpires” have made their debut in baseball’s Atlantic League. The addition is one of several tweaks currently being piloted in the independent league in an attempt to update some fundamentals of America’s pastime.
The system utilizes TrackMan radar to determine whether a pitch is a ball or strike, a Doppler-based system that’s already in use at 30 Major League Baseball Stadiums and many more minor league parks. Information from the system is relayed to a human umpire via an iPhone and earpiece.
The system isn’t replacing home plate umpires entirely, and for now the human ump is required to monitor pitches as a kind of fail-safe. They can also ultimately override TrackMan’s calls. Among other things, the system isn’t set up to detect checked swings — when the batter stops a swing midway to let the ball pass.
A new study of MLB pitch calls makes a strong case for robotic umpires
Disrupt 2026: The tech ecosystem, all in one room
Your next round. Your next hire. Your next breakout opportunity. Find it at TechCrunch Disrupt 2026, where 10,000+ founders, investors, and tech leaders gather for three days of 250+ tactical sessions, powerful introductions, and market-defining innovation. Register now to save up to $400.
Save up to $300 or 30% to TechCrunch Founder Summit
1,000+ founders and investors come together at TechCrunch Founder Summit 2026 for a full day focused on growth, execution, and real-world scaling. Learn from founders and investors who have shaped the industry. Connect with peers navigating similar growth stages. Walk away with tactics you can apply immediately
Offer ends March 13.
“Until we can trust this system 100 percent,” umpire Brian deBrauwere said, “I still have to go back there with the intention of getting a pitch correct because if the system fails, it doesn’t pick a pitch up, or if it registers a pitch that’s a foot-and-a-half off the plate as a strike, I have to be prepared to correct that.”
Robo umps are one of a number of features currently being tested in the Atlantic League, with the intention of potentially bringing them to the majors, should things go well. Other changes include adjusting the mound’s distance from home plate and a three-batter minimum for pitchers.
