POSTERIOR · WIRE
NewsARIOct 6, 2026, 7:41 PM EDTSignal confidence 80%

MLB Tests Outfield Positioning Limits in Arizona Fall League

For the first time, MLB is trialing rules that restrict where outfielders can stand when a pitch is thrown, alongside new infield positioning limits.

Posterior generated visual for Arizona Diamondbacks: MLB Tests Outfield Positioning Limits in Arizona Fall League

MLB is using the 2024 Arizona Fall League to pilot new defensive positioning rules covering both infielders and outfielders. Corner outfielders were observed playing unusually shallow and close to the foul lines regardless of batter or game situation. Sources with MLB and AFL personnel confirmed the league is testing whether tighter positioning restrictions can generate more base hits and improve game aesthetics. The AFL has previously served as a testing ground for rules that later reached the majors, including the pitch timer, infield shift limits, and the ABS challenge system.

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MLB Tests Outfield Positioning Limits in Arizona Fall League