Man is this going to be a good fight.
BJ Penn is the lightweight champion in the UFC, and he is defending his title against the former lightweight champ, Sean Sherk. It's a fight that's been brewing for nearly a year.
Penn has been widely regarded as one of the top pound for pound fighters in all of mixed martial arts, or MMA, for quite some time. He is a well rounded fighter, with excellent striking skills, a black belt in brazilian jiu-jitsu, and the kind of flexibility one gets by having Gumby somewhere in the family tree. One of his weak spots has always been his conditioning and his cardio. When he first started competing in MMA, he relied on his skill, and natural ability to dominate his opponents. Nowadays, you can't just be competent to excel at, well, pretty much any professional sport. Knowing this, Penn has recommitted himself to improving his cardio, and making himself that much more dangerous. This saturday, we'll see how much he has improved, because he's going up against a man that just does not quit in Sean Sherk.