I dont know why you would think Drysdale and Perry were so much better. Drysdale pitched right in the middle of the teeth of the best pitchers era in 60 years and his numbers are hardly better than a lot of these guys even with that. Perry had a lot of good years abut had a lot of pretty average years as well.
I was just looking at pure numbers standpoint.
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"I don't feel like that I am any better than anybody else" - Paul Newman