After a question from a father about his son’s inconsistent pitching velocity, I thought a case study might be the best way to attack the answer. With Zack Wheeler consistently performing at a high-level this post-season, he seemed like the perfect pitcher to examine in the context of this question:

Believe it or not, I wrote a more detailed article about this six years ago, so be sure to check it out, if you missed it back then: Are Pitching Mechanics Really That Repeatable?