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MLB Introduces Major Rule Changes for Triple-A Season

3/17/2026

Summary

Story summary

Major League Baseball will expand robot umpire technology to Triple-A, enabling challenges to checked-swing calls.
MLB will test moving the second base inward, reducing base distances by 9 inches.
The league will limit pitcher disengagements to one per plate appearance and tighten batter timeouts.
Starting pitchers will be allowed to reenter games in the lowest minor league levels.
The changes will be implemented starting March 25, after prior minor-league tests.

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Story summary

Major League Baseball will expand robot umpire technology to Triple-A, enabling challenges to checked-swing calls.
MLB will test moving the second base inward, reducing base distances by 9 inches.
The league will limit pitcher disengagements to one per plate appearance and tighten batter timeouts.
Starting pitchers will be allowed to reenter games in the lowest minor league levels.
The changes will be implemented starting March 25, after prior minor-league tests.