bellings wrote:Honestly, this whole discussion makes me lose faith in ERA+. It appears that it using the individual league for the average ERA, not all of MLB. With the way that the American League has been beating the National League like a red-headed step child, I just isn't a good way to compare pitchers.
You want to compare ERAs of AL pitchers to NL pitchers?? The AL had average ERA of 4.97 in 2006, the NL 4.76. And that was one of the closest margins since the inception of the DH. If you compare players across the entire ML you are giving NL pitchers an automatic 5% headstart on AL pitchers.
ERA+ isn't a tremendous stat for a ton of reasons, its mainly good for quick reference and is easy for most people who don't want to learn about the more indepth stats to understand. But relating a pitchers stat to their league makes perfect sense for what the statistic measures.