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MLB Announces ABS Challenge System Coming to the Major Leagues Beginning in the 2026 Season
Major League Baseball. "MLB Announces ABS Challenge System Coming to the Major Leagues Beginning in the 2026 Season." September 23, 2025, https://www.mlb.com/press-release/press-release-mlb-announces-abs-challenge-system-coming-to-the-major-leagues-beginning-in-the-2026-season.
Why this matters here
Major League Baseball's September 2025 announcement describes the ABS challenge format scheduled for the 2026 season, including who may challenge ball-and-strike calls. The chapter uses the announcement for the design of officiating review, while keeping its interpretation of authority distinct from the rule itself.
