Report
MLB's ball-strike challenge system approaches its first World Series
Science reports Washington State University testers photographed 100 cannon-fired pitches at Petco Park for later camera calibration.
TLDR
As of Oct. 22, 2026, MLB's ball-strike challenge system was approaching its first World Series, Science reported. Umpires still make the initial call; a pitcher, catcher or batter can challenge it. At Petco Park, Washington State University testers photographed 100 cannon-fired pitches with cameras faster than those installed for the system. Science said the images would be analyzed later to calibrate the ballpark's cameras.
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