I think, while mechanical problems can be easy to detect, it’s much harder to actually implement a change. Pitching is a fluid activity that is done without thinking because of repetition and muscle memory. Pitchers fail when they think too much. And when they think about their own mechanics, the pitch location becomes secondary.

And then there is the whole timing thing. When a pitcher makes one change to their delivery, they have to make other changes to correct any timing problems that might develop because of that original change. Everything has to be in-sync…and this is why it’s so hard to make adjustments during the season because it’s hard enough facing big league hitters, but having to focus on repeating your delivery as well makes the task that much more difficult.