Friday, April 11, 2014
Simple team-level +/- metrics
Before he was snatched up by the Redsox, Tom Tippett would provide a simple team-level assessment on his Diamond-Mind site. He would count all the bases that the batters on a team got (TB+BB+HB) and subtracted what the defense gave up. A plus/minus of sorts.
Tony Blengino offered something along the same lines, but focused on K and BB only. As you guys know, the K-BB differential is one of the easiest and most illuminating metrics we have of pitchers. It's so simple and powerful that it is as good, or better, as a predictor of future pitcher performance than any other metric that you will find. Tony therefore simply expanded this idea to look at it on an offense minus defense perspective. A plus/minus of sorts, but limited to just this particular subset of play.
I'm a fan of the approaches that Tippett and Blengino espouse, both for the simplicity of its presentation, but power of its message.
It's why I also am a fan of Bill James' presentation of K and BB numbers on a scale of W and L.?
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