OPS is kind of like Linear Weights
Here, Dan Fox does a bunch of algebra on the OPS formula and discovers that it’s similar in form and results to a Linear Weights function. So now we have a better idea why OPS works – because it’s a lot like Linear Weights.
A few years ago (pdf, see page 25-26), I pointed out (although Clay Davenport did first) that Paul Johnson’s “Estimated Runs Produced,” introduced in Bill James’ 1985 Abstract, also simplified to something close to Linear Weights.
Maybe the same can be done for Runs Created?