At the turn of the millennium, Major League Baseball introduced a system called QuesTec, which used an array of cameras to capture the exact shape of each pitch as it crossed home plate, providing a digital record of the strike zone.
Criticism and controversy
Players and umpires quickly voiced their displeasure, arguing that the technology disrupted the rhythm of the game and raised questions about its accuracy. Despite the backlash, the data collected proved invaluable, laying the groundwork for the league’s later push toward fully automated strike‑zone calls.
One of the most talked‑about moments came in May 2003, when Arizona Diamondbacks right‑hander Curt Schilling took the mound against the San Diego Padres. Schilling’s outing was marred by a nine‑hit, two‑walk, three‑run performance that swung momentum in favor of the Padres.
The Padres ultimately finished the 2003 campaign with one of the league’s worst records, a downturn that many analysts linked to a series of inconsistent pitching performances, including Schilling’s.
From experiment to automation
Today, the Automated Ball‑Strike system, which blends high‑speed cameras with machine‑learning algorithms, is used in many minor leagues and is being considered for full‑scale adoption in the majors. Its lineage can be traced back to the pioneering, if contentious, QuesTec trials of the early 2000s.