I think you have to consider the NUMBER of overall victories AND the career winning percentage in order to get a TRUE idea of how good a pitcher was. They must have proved themselves over a LONG period of time, not just a short stint.Phil Neikro had 300+ wins... but had 274 losses. Sandy Koufax only had 6 dominating seasons. Whitey Ford had the benefit of the Yankee lineup giving him run support.----------------------------------BUT.....there are only THREE pitchers in HISTORY who have won over 300 games AND won more than 65% of the games in which they pitched:LEFTY GROVE: 300-141 (.680)ROGER CLEMENS: 334-167 (.667)CHRISTY MATHEWSON: 373-188 (.665)I don't know who else would make up the "Top 5" pitchers of All-Time...but these three MUST be included on any list.