BJ Penn defended his UFC lightweight championship with a submission of Kenny Florian in the fourth round at UFC 101. Penn makes his return to the Octagon against Cole Miller on June 4 at UFC 199.

It's phenom vs. fearless as dynamic champion Jose Aldo faces the nearly-unstoppable "Korean Zombie," Chan Sung Jung. Plus, light heavyweight legend Lyoto Machida looks to shut down rising force Phil Davis.

UFC Tonight analysts Kenny Florian and Chael Sonnen are here to give their expert predictions.

UFC Tonight's Kenny Florian and special guest Daniel Cormier give their predictions for UFC 159: Jones vs Sonnen. With exciting fights Alan Belcher vs Michael Bisping as well as Cheick Kongo vs Roy Nelson, there's a lot to cover.

BJ Penn shows why he deserved to wear the UFC lightweight strap inside the deep waters of his UFC 101 title fight against Kenny Florian.

FREE MMA VIDEO: This episode features a look at Mike Russow - the police officer, Fabricio Werdum's favorite move, and UFC by the numbers.

Kenny Florian fue un gran peleador de UFC, ahora que se ha retirado, ¿merece entrar algún día al Salón de la Fama del UFC a pesar de nunca haber conseguido un título?

Never-seen-before footage from The Ultimate Fighter Live, Joe Rogan counts down the top 8 TUF alum, and Forrest Griffin and Stephan Bonnar sit down to trade stories.

After retaining his title with a decision over Kenny Florian, featherweight champ Jose Aldo sets his sights on his next challenger: undefeated Chad Mendes.

Watch UFC 136 fighters weigh in at the Toyota Center in Houston, TX.