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100 Greatest Red Sox players

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37. Dutch Leonard, LHP

Photograph By Bruce Bennett Studios/Getty Images

In six seasons with Boston from 1913 to 1918, Leonard compiled a 90-64 record with a 2.13 ERA. The lefty hurler owns the modern-era record for lowest single-season ERA with 0.96, a feat he accomplished in 1914 with a 19-5 campaign.