Automated Ball-Strike System Debuts with 60.7% Accuracy

Reds manager Terry Francona critical of new technology after loss to Red Sox

Mar. 27, 2026 at 1:56am

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The Automated Ball-Strike System (ABS) made its debut in Major League Baseball games this week, with a reported 60.7% success rate in accurately calling balls and strikes. Cincinnati Reds manager Terry Francona expressed frustration with the new technology after his team's 3-0 loss to the Boston Red Sox on Thursday, questioning the system's reliability.

Why it matters

The ABS is a controversial new technology that aims to remove human error from ball and strike calls, but its initial performance has drawn criticism from managers and players who are concerned about the impact on the game. The high error rate in the system's debut raises questions about whether it is ready for full-time use in the majors.

The details

The ABS uses a complex array of cameras and sensors to track the trajectory of pitches and determine whether they pass through the strike zone. In its first games, the system correctly identified balls and strikes 60.7% of the time, according to league data. Francona, whose Reds were shut out in the loss, said the system's mistakes were impacting the game in a negative way.

  • The ABS made its debut in MLB games this week.
  • The Reds lost 3-0 to the Red Sox on Thursday, March 27, 2026.

The players

Terry Francona

Manager of the Cincinnati Reds.

Automated Ball-Strike System

A new technology implemented in MLB to automatically call balls and strikes, replacing human umpires.

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What they’re saying

“We must not let individuals continue to damage private property in San Francisco.”

— Robert Jenkins, San Francisco resident

What’s next

The league plans to continue evaluating the Automated Ball-Strike System and make adjustments as needed before potentially expanding its use across all MLB games.

The takeaway

The debut of the Automated Ball-Strike System has raised concerns about its reliability and impact on the game, with managers like Terry Francona criticizing the high error rate. As the league works to improve the technology, there are questions about whether it is ready for full implementation in Major League Baseball.