A collection of UFC knockouts, all coming from devastating knees -- some of the most effective strikes inside the Octagon; featuring Marlon Moraes, Jeremy Stephens, Carlos Condit, Ricardo Lamas, Jose Aldo and Anderson Silva.

A look at some surprising knockouts from the UFC.

A look at highlight knockouts from the UFC.

Great fight finishes from the sport's best knockout artists. Featuring Anderson Silva, Vitor Belfort, Anthony "Rumble" Johnson, Andrei Arlovski, Roy Nelson and more.

The best knockouts from 2015, an action-packed year inside the Octagon. Featuring Ronda Rousey, Stephen "Wonderboy" Thompson, Dan Henderson, Holly Holm, Uriah Hall and more.

Conor McGregor, Michael Bisping, Alexander Gustafsson, Lyoto Machida, Yoel Romero, Joanna Jedrzejczyk and more.

Athletic alumni of the Strikeforce promotion ply their trade in the UFC Octagon and the Strikeforce hexagon. With Ronda Rousey, Robbie Lawler, Daniel Cormier, Cris Cyborg, Alistair Overeem and more.

Knockouts that define the career of UFC fighters inside the Octagon.

Featuring Carlos Condit, Lyoto Machida, Rafael Dos Anjos, Donald Cerrone and more.

A look at some of the sport's most surprising and memorable knockouts; with Junior Dos Santos, The Korean Zombie, Ronda Rousey, Jeremy Stephens, Darren Elkins, Nikita Krylov and more.

Featuring some of the sport's most surprising and memorable knockouts. With Junior Dos Santos, The Korean Zombie, Ronda Rousey, Jeremy Stephens, Darren Elkins, Nikita Krylov and more.

MMA greats deliver strikes that send their opponents face-first into the canvas.

The greatest finishers from the heavyweight division including Cain Velasquez, Minotauro Nogueira, Junior dos Santos, Andrei Arlovski and more.

A look at the Ultimate Fighter coaches.

Looking back at the best knockouts from the past year.

A look at the greatest knockouts to take place inside the Octagon in 2016. Featuring Garbrandt vs. Almeida, Miocic vs. Werdum, Woodley vs. Lawler, Bisping vs. Rockhold 2, Paige VanZant vs. Bec Rawlings, Dan Henderson vs. Hector Lombard and many more.

Fights that end via perfectly thrown counterpunches. Featuring Conor McGregor, Stipe Miocic, Chuck Liddell, Shogun Rua and more.

We bring you exciting finishes from the top-tier fighters who first made their names on The Ultimate Fighter reality show, including Rashad Evans, Diego Sanchez, Roy Nelson, Nate Diaz, and TJ Dillashaw.

Flying knees, spinning kicks and backfists are just a few of the methods used to end fights in this episode of UFC Ultimate Knockouts. Featuring Carlos Condit, Travis Browne, Dennis Siver, Renan Barao and more.

Featuring Chuck Liddell, Jon Jones, Anderson Silva, Cain Velasquez and more.

Vicious head-kick knockout highlights from Anderson Silva, Anthony Pettis, Lyoto Machida, Rashad Evans and more.