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1-3-1 — Modified the effective date that baseballs shall meet a NOCSAE performance standard. (Effective January 1, 2020).

6-1-3 — Modified an element of the pivot foot requirement.

Officials’ Signals — Created a signal for a 3- or 4-person mechanic to indicate the direction of rotation to the umpiring crew.

Officials’ Signals — Created a signal for a game umpire to alert his or her partner of relevant information.

2019 Baseball Points of Emphasis

1. Sportsmanship
2. Compliance of Players' Equipment
3. Baserunner's Responsibilities