New answers tagged baseball
2
The oldest reference to wSB that I'm familiar with is this Fangraphs article, which is from 2013, and I think in 2012 perhaps is when they actually introduced the stat. It's possible it originated elsewhere, but the formula you provide there is Fangraphs' formula, and I imagine another source would use different parameters.
As for why it's -2*R/O ... that's ...
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