RESEARCH: Pitchers' secret weapon for delaying the adverse effects of aging

Recently, I predicted that the leaguewide increase in strikeouts would finally reverse trend in 2015, after discovering that the rise could be largely attributed to unsustainable churn in the player pool, citing that the fountain of higher-strikeout minor league players (both batters and pitchers) that have been gradually replacing outgoing lower-strikeout major league players may have finally run dry.

One of the key assumptions made in that analysis is that the perceived increase in strikeout rates among established players (those who have played in the year analyzed as well as the years immediately before and after) is a statistical mirage caused by recent higher-strikeout incoming players cumulatively accounting for a higher and...


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