In Defense of OPS

On Twitter, pals and co-authors Tom Tango and Mitchel Lichtman had a fun little argument about two interesting baseball statistics, OPS (On Base Plus Slugging Percentage) and wOBA (Weighted On Base Average). Tango made the solid argument that OPS is a mathematical crime -- you are adding together fractions that do not have the same denominator (which, you might remember from middle school math, you aren't supposed to do). OBP is built on plate appearances. Slugging is built on at-bats. The deeper you go into the math, the hairier it gets.

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