Calling an illegal pitch is the responsibility of every umpire on the field. It requires a good knowledge of the rules governing this violation, using the correct mechanics, and administering the ruling which may involve explaining the options for the violation. The articles for correct mechanics and administering the rule can be found in the Mechanics and Game Management sections
Pitching Procedures Before Pitch
Pitching Position As the pitcher steps onto the pitcher’s plate with the intent to throw the next pitch, she must have her hands apart with the ball in either her glove or her pitching hand. A minor addition to the legal pitching position in 2020 – the pitcher’s hips must be in line with 1b and 3b. The plate umpire