STARTERS: BPV none on/runners on, 2021

Our research almost a decade ago showed that there are significant skill differences among pitchers when throwing with the bases empty compared to with runners on base.

This trend continues to hold true. Pitchers have produced a 100+ BPV in four straight seasons with the bases empty, while their skills when pitching with runners on base have been subpar.

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  For more information about the terms used in this article, see our Glossary Primer.