RESEARCH: Home field advantage and Wins

This article first appeared in the the 2022 Baseball Forecaster

Starting pitchers have been earning fewer and fewer Wins in recent years. The percent of games started in which the SP earns a Win consistently hovered at about 35% from 2002-2014 before turning downward by an average of 1% per year from 2015-2021, to the point that the average SP won only 28% of their starts in 2021:

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