Quote:
Originally Posted by aro13
All I said was Koufax was very good up until 1961 and then starting in 1962 he was great. ERA + accounts for park, but not for the extreme differences in parks for various pitchers. The same way OPS+ doesn't account for the huge advantage some players had playing in Fenway Park or Coors Field.
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He performed at the league average level until 1961. That is not “very good.”