text: is roger clemons the best pitcher all-time? statistical proof on details.? here are statistical proof that he should be the best pitcher in the history of baseball.   1.7 time cy young winner.  2.11 time league mvp.  3.341 career wins.(17 more than nolan ryan and steve carlton)  4.best era at age 43.(nolan ryan:age34, and steve carlton:age 27)  5.best era average in one baseball season:1.87. definitely the best modern day pitcher and probably top five all-time. the problem with comparing him to a guy like grove or young is that the advent of five-man rotations and relief pitchers changed things so much. five-man rotations meant less starts and relievers meant a pitcher could run out of gas in the sixth but have someone else finish his win for him.  the problem with clemens is he doesn't lead career strikeouts, wins, or winning percentage, so it's hard to say he's obviously the best ever. he has alot of cy young awards but that's just as much a measure of league talent as it is an individual pitcher's talent. top five in no particular order: clemens, carlton, walter johnson, warren spahn, cy young.