Watch the official weigh-in for UFC Fight Night: Gonzaga vs. Cro Cop 2.

UFC commentator Joe Rogan takes you through the top 10 headkick knockouts of UFC history, including Gabriel Gonzaga's historic right head kick KO vs. Mirko Cro Cop.

UFC commentator Joe Rogan breaks down the matchup between Gabriel Gonzaga and Mirko Crop Cop at Fight Night Krakow on April 11.

UFC Minute Lisa Foiles recaps the fight announcements from this weekend, including an international expansion into Poland with PRIDE legend Mirko Cro Cop.

Get up to date on the return of Mirko Cro Cop, Liz Carmouche's next foe inside the Octagon, and new downloadable characters in EA Sports UFC!

UFC heavyweight Frank Mir rebounds from a first-round loss to Shane Carwin with this impressive KO of Mirko Cro Cop.

PRIDE legend Mirko Cro Cop was supposed to smoke Gabriel Gonzaga in this UFC 70 gimme. As cold-blooded Cro Cop sized up a body kick, Gonzaga threw a stunning head kick of his own for one of the most surprising knockouts in UFC history.

Mirko Cro Cop had an impressive string of first-round finishes before running into Gabriel Gonzaga at UFC 70. Gonzaga stopped the vet with a vicious head kick, earning himself a heavyweight title shot against Randy Couture.

The Ultimate Fighter alum Brendan "The Hybrid" Schaub finished Mirko Cro Cop with this devastating right hand in the third round of their UFC 128 bout.

Celebrate 20 years of MMA with this compilation of the 100 greatest knockouts from the past two decades. This is a fight fan’s dream: a collection of the best jaw-dropping, eye-popping knockouts ever seen, many of which have not been televised for years.

Frank Mir vs. Minotauro Nogueira, Pat Barry vs. Christian Morecraft, Lavar Johnson vs. Joey Beltran, Roy Nelson vs. Mirko Cro Cop, and Alistair Overeem vs. Brock Lesnar are featured in this episode of UFC Unleashed.

Are you ready for the biggest night in UFC history?