dear shlomozalman, I saw Koufax pitch, too, and it was a sight to behold.
The reason I am hesitant to say Koufax, is that the stellar part of his career only covered six seasons. I think that the greatest athlete should be someone who played well over a long career.
If you asked me who pitched better than anyone else ever, I would not hesitate to say Sandy Koufax.
If you asked me who was the best pitcher of all time, I’d have to name someone other than Koufax.