quote:
Originally posted by IEBSBL:
When we throw bullpens our program expectations are that with throw Fastballs for strikes 67% of the time and breaking balls at a 50% rate. I want to include a % for hitting there location. What do you think would be a good goals for Fastballs and Changes/Breaking Balls?
How did you come up with those two percentages? IOW, what are they based on?
What you should do to figure out that percentage, is to first establish what’s a reasonable base line, and to do that you’ll need to know 2 things. The 1st is, what’s the definition of hitting a spot going to be, and the 2nd is how you’re planning on measuring it. Ex: The catcher’s mitt is determined to be the target/spot/location, and a “spot” is considered to be anything inside the perimeter of the mitt. That means if the diameter of the mitt is 12”, the “spot is much closer to 18”, the same way the plate us 17” wide, but a ball on the very edges widens it about 6 more inches.
Now on to the more difficult thing, measuring it. Who’s gonna be doing the measuring? The catcher, the pitcher, a coach? And measuring has to be fairly consistent from person to person, otherwise the data won’t be worth very much. So, is the measure gonna be how much the catcher has to move the mitt to catch the ball? Remember, if you use the perimeter of the mitt as a “spot” the catcher should never have to move the mitt more than 6-9” to catch a ball. If you’re gonna use some arbitrary thing like “It looked good to me”, you’re gonna have lots of trouble.
There you have it. Now you can check all your pitchers for 1 pen and establish a baseline for each, and what’s “normal” for the team.
But to be honest, I believe you’d get more meaningful information tracking where the pitch missed, rather than the percentage of times it missed. Here’s why. I think if you’re honest, you soon find out that pitchers hitting “spots” very often is much more of a wish than a fact. But even if it wasn’t, what would it tell you if Joey could hit his spots 90% of the time and Billy on 75%?
But, if you knew that 2 pitchers were RHded and Billy missed more often on his glove side when he was trying to throw a curve, and Joey missed more often on his non-glove side, it could mean a great deal to how you called pitches, and perhaps even give you an idea about what to look for in a mechanical flaw.
Just sayin’.