Official Rules(view all)

NFHS 6-1-2

NFHS 6-1-2/OBR 5.07a1

If the high school pitcher has taken the windup position, the only legal moves he can make are to deliver a pitch or step back off the pitching plate. If he is legally in contact with the pitcher’s plate in the windup position and steps and throws to a base for a pickoff play, it is a balk. The ball is dead immediately and all runners get a base.

[OBR: pickoff move from the windup position is legal.]