Pedro Martinez with Gibson, Koufax behind. A lot of guys put up great numbers in their repective era's, but look at the hitting now in Pedro's day compared with Matthewson. The record for homers then was like 30 for a career. Now you hitters on steriods, creatine, along with vastly better conditioning and technology to drill hitters all year round. Pitchers, theres not much more you can do for them as strength, tech., don't help them. Conditioning will, but not much else. That's why Pedro is tops all-time. He does it when the average is ERA is 4.50, instead of 3.00 as was 60'-70's and even lower before them. You got to scale what everyone else does at the same time. There was half-dozen great ones at the same time up until the 90's. Now there's only one (debatably 2 with RJ).