In response to demands for an alternative way to rate pitchers besides wins and losses, the National League will officially keep ERA’s for the first time; the Giants’ Jeff Tesreauwill lead the league at 1.96. Despite an increase in .300 hitters from 22 to 32 this year, there will be 19 pitchers with ERA’s under 3.00. The American League will not make ERA part of its official statistics until 1913.

On August 27, 1912 — In response to demands for an alternative way to rate pitchers besides wins and losses, the National League will officially keep ERA’s for the first time; the Giants’ Jeff Tesreauwill lead the league at 1.96. Despite an increase in .300 hitters from 22 to 32 this year, there will be 19 pitchers with ERA’s under 3.00. The American League will not make ERA part of its official statistics until 1913.

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Sources:
Baseball Reference August 27
National Pastime August 27
Retro Sheet
Hall of Fame
SABR Games Project
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