In my PPIBTH algorithm I have Pettite 5 steps ahead of Roy which is 2 x a two step plus 1.
Someone brought up the fact only a few HOFs ERA are over 3.6 etc. I am not sure what an accepted reduction in ERA for AL pitchers is allowed when comparing them to career NL counterparts or pre 1973 seasons for HOFs. I would imagine over a 18 year career your ERA would be .3 less. Andy did really well in his brief time with the Astros for example era wise i believe, but havent checked it out.
My algorithm may be a bit biased as it stands for 'Prove Pettite is better than Halladay' so there may be some markers in there that are slightly tainted.
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