After a shocking start in the first round, Donald "Cowboy" Cerrone battles back and delivers a head kick, then a right hand to finish Melvin Guillard. See Cowboy in the Octagon against lightweight contender Jim Miller at UFC Fight Night Atlantic City.

Jim Miller reels in his third straight win by submission or knockout in this UFC on FX 1 bout against Melvin Guillard.

Watch the full weigh-in for UFC Fight Night London: Gustafsson vs. Manuwa.

Michael Johnson has a chance to prove himself against one of the more dangerous lightweights in the UFC while his opponent, Melvin Guillard, looks for his 21st career knockout. Watch them duke it out at Fight Night London on Saturday.

A massive left hand followed by a sequence of hammer fists earned Melvin Guillard the knockout victory in Seattle at UFC on FOX 8.

Donald "Cowboy" Cerrone had won seven of his previous eight bouts before stepping into the Octagon against the dangerous Melvin Guillard. The Denver native, Cerrone, stunned the Young Assassin before landing a flush right hand to finish the fight.

A borderline-illegal knee from Melvin Guillard cuts Ross Pearson's forehead open in the first and cuts their lightweight bout short. Hear from both lightweights after the disappointing result.

Lyoto Machida joins fellow former light heavyweight Mark Munoz at 185 pounds, while Ross Pearson comes back home to lightweight for his fight against Melvin Guillard.

WHOA! TV speaks to Melvin Guillard before his UFC Manchester co-main bout against Ross Pearson.

At UFC 150, Donald Cerrone and Melvin Guillard will go to war once the Octagon door closes. The winner will emerge at the top of the heap of the 155-pound contenders.

Hometown hero Donald Cerrone shares a moment backstage with opponent Melvin Guillard after their Fight of the Night performance at UFC 150.

"I want to fight everybody in the division." Watch some of the best moments from the UFC® 150 pre-fight press conference, featuring Benson Henderson, Frankie Edgar, Donald Cerrone and Melvin Guillard.