Lie-rockets in flight

Jon Stewart had some amusing commentary on the Rocket's testimony before Congress last week, and I have a question of my own. What kind of weak-ass defense is it to claim that Andy Pettite "misremembered" their conversation about HGH, and that it was Clemens' wife who was juicing? WTF? Sure, that sounds plausible; I comment to my friend that my wife is using HGH and he misunderstands me to be confessing to blatantly cheating? How did he not get hammered more about this? Pettite is the smoking gun for me, because he has no reason to make up a story about Clemens, but has every reason in the world to protect his friend.