MLB teams
Associated Press 9y

Career ERA-League ERA Differential

MLB, Seattle Mariners, Baltimore Orioles

(minimum 1,500 innings pitched)

PLAYER SPAN PLAYER LEAGUE DIFF

Pedro Martinez 1992-2009 2.93 4.40 -1.47

Carl Hubbell 1928-1943 2.98 4.13 -1.15

Lefty Grove 1925-1941 3.06 4.21 -1.15

Hoyt Wilhelm 1952-1972 2.52 3.67 -1.14

Greg Maddux 1986-2008 3.16 4.28 -1.13

Roger Clemens 1984-2007 3.12 4.25 -1.12

Felix Hernandez 2005-2014 3.07 4.15 -1.07

Whitey Ford 1950-1967 2.75 3.80 -1.06

Johan Santana 2000-2012 3.20 4.25 -1.05

Sandy Koufax 1955-1966 2.76 3.77 -1.01

Randy Johnson 1988-2009 3.29 4.30 -1.01

Kevin Brown 1986-2005 3.28 4.26 -0.98

John Smoltz 1988-2009 3.33 4.30 -0.97

Note: ERA became an official statistic in 1913

Source: STATS LLC

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