Bj penn's greatest acheivements

In my opinion Bj Penn is the greatest Mix Martial Artist in the World. In his 10+ years of Mix Martial Arts, Bj fought very good opponents. If his opponents weren't Champions then they were probably top Contenders. Through out his MMA fighting career he's fought the best. One of his greatest achievements was being named the first none-Brazilian Jujitsu Champion. For many people earning a black belt in jujitsu takes you at least 4-8 years for some people but for Bj penn he became a black belt in jujitsu with only 3 1/2 years, that's insane for most people.  He is the second man in the UFC to hold two championship belts. The first Championship belt is a Welterweight belt, defeating Matt Hughes by a re-naked choke in there first match up. He then defeated Shaun Sherk by an exciting fashion finishing him with a TKO for the Lightweight belt. This makes Penn one of the top pound for pound MMA (Mix Martial Artist) fighters in the World today.