The David Price Rule
Who knew this was a thing??
“With a runner or runners on base, a pitcher will be presumed to be pitching from the Set Position if he stands with his pivot foot in contact with and parallel to the pitcher’s plate, and his other foot in front of the pitcher’s plate, unless he notifies the umpire that he will be pitching from the Windup Position under such circumstances prior to the beginning of an at-bat,” the rule states. “A pitcher will be permitted to notify the umpire that he is pitching from the Windup Position within an at-bat only in the event of (i) a substitution by the offensive team; or (ii) immediately upon the advancement of one or more runners (i.e., after one or more base runners advance but before the delivery of the next pitch).”
Cleveland pitcher balked in a run in a scoreless game against the BoSox. Ended up losing 2-0.