Friday, December 04, 2009
How the height of the pressbox affects the classification of an airball being a line drive
First, I will have to give out my nah-nah-nah, toldyouso. If BIS and STATS and MLBAM had simply listened to me all those years ago, and simply gave everyone a g-dd-mn stop watch, we wouldn’t be in this predicament. We don’t need to know if the ball was 2.3 or 2.35 seconds in the air. I’d be happy if the measurement error was even 0.5 seconds (which is huge considering that a pitch thrown from the mound to the plate takes less time than that). But no, I’m told, you don’t solve a problem with a regular hammer, when a jackhammer is more powerful and costly and harder to implement.
Now, here’s Colin showing us, with data, that a pressbox that is 45 feet high will have a 32% line drive rate, while one that is 65 feet high has a 36% line drive rate. But, at below 40 feet and above 70 feet, it might be different, because things don’t always follow a linear rate, and guys at extreme levels might rely on different methods to figure if a ball is a line drive or not.
I love the article, and I love any light that shows that data collected as a discrete value is not always “objective”.


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