Official Rules(view all)

NFHS 6-1-2

NFHS 6-1-2/OBR 5.07a1 Comment

With no runners on base, if a pitcher goes from the windup position to the stretch position (or vice versa) without first legally stepping off the pitching plate, it is an illegal pitch. A ball is added to the count.

[OBR: this would be a balk with runners on base; with no runners the umpire would just call time and “reset”.]