What must F1 do to properly disengage the pitcher's plate?

To properly disengage the pitcher's plate, the fundamental rule is that the pitcher must step backward with the pivot foot first. This action ensures that the pitcher legally steps off the pitching rubber and indicates that they are no longer in a position to pitch. By stepping backward, the pitcher clearly communicates their intention to disengage, which is important for maintaining the flow of play and adhering to the rules concerning pitching mechanics.

Other options do not meet the established requirements for disengaging the pitcher's plate. Stepping forward first from the windup or making a play without a proper disengagement step could confuse players and umpires regarding the pitcher's status on the plate. Additionally, merely touching the ground outside the pitcher's plate without the proper footwork does not qualify as a legal disengagement, as it does not follow the specific mechanics required by the rules of the game.