The Story of the Only Triple That Was
First there was man, and then there was baseball. Soon after baseball there were baseball statistics, because there’s no sense in male competition if you don’t have a record of who’s good and who’s not. Baseball was played in ballparks, and in time people came to notice that different ballparks affected the game in different ways. Eventually people put numbers to park factors, and after there were park factors, there were park factors broken down by handedness. This is where we are today, with the focus being on how specific environments affect specific players. Later on, we’ll know a lot more than we know today, but today we know plenty, relative to what we knew just a few years ago.
As we’ve come to understand park factors, we’ve come to understand the importance of sample sizes. Many prefer multi-year factors over single-year factors, because single-year factors can be misleading. That’s when you’re dealing with events that happen a lot, like walks or strikeouts or singles. Even with multi-year factors, you can observe wild swings with events that happen more rarely. I’m talking here about park factors for, say, hit batters, or park factors for triples. With that in mind, the updated righty park factor for Progressive Field for triples could end up looking a little silly. Let me explain.