ERA+ has issues. This was brought to my attention awhile ago by Sky Kalkman (see the Storify for lots of gruesome details). I’ve written about some of the issues with ERA+ as they relate to Rick Reuschel. But today I want to bring up something different.
I was looking at the ERA+ career leaders (you know, because Mariano Rivera). I found this:
Only 40 pitchers have an ERA+ of 130 or better (1000+ IP). 174 hitters have an OPS+ of 130 or better (3000+ PA).
— Adam Darowski (@baseballtwit) September 30, 2013
