RESEARCH: Extreme Makeovers: PQS Edition has used our Pure Quality Starts (PQS) metric to measure game-level starting pitcher performance for well over a decade. It is a brilliant way to cut through the noise of bad fielding, bad timing, and bad luck to determine the truth about a single start—or a season’s worth of them—all with a metric you can calculate in your head.

But major league benchmarks have changed dramatically since PQS was introduced back in 2002. Because PQS isn’t allowed to use modern statistical conveniences like league indexing or long division, the time has come to update PQS to reflect today’s game. We briefly touched on the issue in a column last June, but with the new season, it seemed like the perfect time for a revamp—and...


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