Posted by bad_luck on 6/14/2016 5:53:00 PM (view original):
Let's say there's a respected baseball site called Funstats. Funstats looks at the ERA calculations and decides that the way earned runs are calculated doesn't make a ton of sense. So, in an effort to improve the ERA stat, Funstats changes their earned runs calculation. They publish ERA with the different earned run method on their site as just ERA but everyone knows it's a little different.
Does that make ERA a "subjective metric that isn't even a stat?"
ERA is finite. It's how many runs a pitcher gives up for every 9 innings. If you want to change the definition of ERA to be "runs per 8 innings", cool - you can still measure that with accuracy.
If you want to come up with some newfangled formula to determine how good a pitcher really is - expect people to take it with a grain of salt.
Also, ERA has one function - to tell you how many runs a pitcher gives up over a full game. I don't think anyone will tell you that ERA is the single number that defines a pitchers value. It's one of many pitching stats.
6/14/2016 7:35 PM (edited)