Roger Clemens

For you baseball fans out there, Freakonomics Blog looks at Roger Clemens career stats

We conclude that “the available data on Clemens’s career strongly hint that some unusual factors may have been at play in producing his excellent late-career statistics.”
To be clear, we don’t know whether Roger Clemens took steroids or not. But to argue that somehow the statistical record proves that he didn’t is simply dishonest, incompetent, or both. If anything, the very same data presented in the report — if analyzed properly — tends to suggest an unusual reversal of fortune for Clemens at around age 36 or 37, which is when the Mitchell Report suggests that, well, something funny was going on.