Pat Venditte rule

American  

[pat ven-dit-ee rool] / ˈpæt vɛnˈdɪt i ˌrul /

noun

Baseball.

1. a rule that prohibits a pitcher from switching between right- and left-handed throwing during an opponent’s at-bat, contrasted with a switch hitter's freedom to switch between right- and left-handed batting during an at-bat.

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Etymology

Origin of Pat Venditte rule

Named after Pat Venditte (born 1985), an ambidexterous pitcher whose disruptive practice of switching his throwing arms during an at-bat prompted adoption of the rule in 2008