@adbono posted:Some coaches have a general rule to not throw R on R, or L on L, change ups. Period. Regardless of the circumstances. I do not agree. It depends on the quality of the change up that any individual pitcher throws. If the CU is a pitcher’s 3rd best pitch you want to be careful about when it’s thrown. But if it is high quality it can be an effective pitch to any hitter. Hitting is all about timing. Therefore, pitching is about upsetting a hitter’s timing. And nothing does that better than effectively changing speeds.
100% agree with this post. I believe the standard reasoning is that a typical change up in going to run in on a same sided batter (where a lot of bad things can happen). However, a good split is also a change up, and it's commonly thrown to same side hitters.