“The best evidence for a power pitchers’ potency is strikeouts. Clemens’s strikeout rate relative to the league declined as he aged. If he was getting some artificial help, wouldn’t we have expected him to have improved in this area? The one thing that jumps out at you when you look at the numbers for Clemens’ last several seasons is not striking out batters but preventing walks. That’s the part of his game least likely to have been affected by PEDs. I think this lends support to the idea that Clemens was able to maintain effectiveness as he got older because he simply got smarter and tougher.”
If you would like to see my analysis of Roger Clemens’s career, you can read my initial post on the subject here. And, this post contains links to several statistical analyses of Clemens’s career. In summary, my view is this: if Clemens used performance-enhancing drugs, they didn’t work. Contrary to popular opinion, the statistical record does not support Brian McNamee’s allegations.