How witness credibility plays into the NFL’s disciplinary process is unclear. In a letter to Elliott informing him that he had been suspended for six games, the league said that advisors to league commissioner Roger Goodell had found “substantial and persuasive evidence” that Elliott had been violent toward Thompson. (The NFL’s personal-conduct policy says that a player who has not been charged with a crime can still be disciplined if there is “credible evidence” that he violated the policy.) An NFL spokesperson, asked what the “substantial and persuasive” standard means and how it compares to a preponderance-of-evidence one, was unable to clarify the issue for Deadspin.
Remember, nothing is alleged to--or can have--happened to all of MLB over some one or two seasons: the claim is that PEDs were being used at a slowly but steadily increasing rate (and thus "distorting records") from very roughly 1980 through the present. Were that so, or anything like it, we would expect to see a clear long-term uptrend during this period. But we don't: we see a nearly flat line that, if anything, slopes slightly down. The "boost" just isn't there. But that doesn't seem to stop anyone from talking about it.