He made the same mistake that Clemens and Palmeiro did: he was too vociferous in his defense. He was the best participant in the dirtiest sport on Earth, a sport so dirty that SI did an expose into the drug culture of cycling at the same time they lauded Sosa and McGwire as Sportsmen of the Year. Think about that.
A great shot is when you pull it off. A smart shot is when you don't have the guts to try.