1965 when Koufax did it .
Peavy and Kershaw are only two pitchers in the National League have led the league in wins , strikeouts , ERA , and WHIP ( walks plus hits per inning pitched ) .
Since 1965 when Koufax did it , Peavy and Kershaw are only two pitchers in the National League have led the league in wins , strikeouts , ERA , and WHIP ( walks plus hits per inning pitched ) .