Roger Goodell: Drug Probe Limited to Rodney Harrison, Wade Wilson, Richard Ryzde

Patriots safety Rodney Harrison has been suspended for the first four games of the season for admitting to obtaining human growth hormone from an illegal Internet pharmacy. Cowboys quarterbacks coach Wade Wilson has been suspended for five games for essentially the same offense. And former Steelers doctor Richard Ryzde has been fired for his role in the investigation.

But are those the only three people associated with the NFL who were involved? Yes, according to NFL commissioner Roger Goodell, who says that the league has cooperated fully with investigators and hasn't heard any names other than those three.

That's good news for the league, but it would be naive to think those are the only three people in the NFL who have any connection to HGH. As long as the league doesn't test its players for HGH -- the league and the union say no reliable test exists; some experts believe it is possible to test for it -- it's safe to say that many players will use it to gain a competitive advantage. So even if the league's involvement in this case was fairly limited, it's only a matter of time before we next hear about the combination of the NFL and HGH.