If you’re going to write a book about baseball and statistics, how about actually taking a few minutes and learning what the terms actually are? Somewhere in the “Gosh, Bill James is certainly the most brilliant mind to ever thing about baseball stats, isn’t he?” chapter, Lewis has a rather lengthy footnote about how on base percentage isn’t actually a percentage (which is true), but says it’s a “per thousand”. Um, no. If it were, it would be expressed as “450”, not “.450”. It’s a fraction. He then does the same sort of explanation of slugging percentage, saying that it’s not a percentage (true), but claims it’s a “per 4 thousand”, when in fact it’s an average. Correcting something with another wrong answer doesn’t help.
(There are many, many other things that annoy me about this book, but arrogantly giving an incorrect correction is the low point so far…but I’ve still only about 1/3 of the way through it.)