Joe Rogan previews the UFC 212 co-main event between strawweight contenders Claudia Gadelha and Karolina Kowalkiewicz.

When Claudia Gadelha and Karolina Kowalkiewicz meet in the center of the Octagon at UFC 212, it will be the No. 1-ranked strawweight vs. No. 2 in a battle of strawweight title contenders. Both women want another crack at Joanna Jedrzejczyk.

Watch Vitor Belfort in the Octagon after defeating Nate Marquardt at UFC 212 in Brazil.

In advance of UFC 212: Aldo vs Holloway, UFC will host a media conference call on Thursday, May 25 at 2 p.m. PT/5 p.m. ET with the stars of the main event.

Vitor Belfort talks backstage after his victory over Nate Marquardt at UFC 212.

Watch Nate Marquardt defeat C.B. Dollaway during their bout in December of 2015. Don't miss Marquardt take on Vitor Belfort at UFC 212.

UFC Minute host Lisa Foiles previews some under-the-radar fights to look out for at UFC 212.

UFC Minute host Lisa Foiles previews some potential Fight of the Night contenders at UFC 212.

Eric Spicely earned a rare opportunity to get a second chance at fighting in the UFC, despite losing his first bout for the promotion after his appearance on The Ultimate Fighter.

Watch Yancy Medeiros in the Octagon after defeat Erick Silva at UFC 212.

Max Holloway talks backstage after his victory over Jose Aldo to become the undisputed featherweight champion.

Watch as the stars from the UFC Summer Kickoff Press Conference face-off. Featuring Daniel Cormier, Jon Jones and more.

Max Holloway's career-defining, title-capturing win against legend Jose Aldo at UFC 212 earned him a big jump in the pound-for-pound rankings this week. Forrest Griffin & Matt Parrino talk Holloway, Marlon Moraes and preview Derrick Lewis vs Mark Hunt.

Follow Claudia Gadelha's journey from a small town in Brazil to chasing her dreams in the UFC and her upcoming fight against Karolina Kowalkiewicz at UFC 212.

Forrest Griffin and Matt Parrino break down the changes in the rankings, including a look at Alexander Gustafsson and Volkan Oezdemir’s victories. Plus, the guys preview Jose Aldo vs. Max Holloway and Claudia Gadelha vs. Karolina Kowalkiewicz at UFC 212.

Max "Blessed" Holloway loves to punch people in the face and his spectacular striking game will be on display when he faces UFC featherweight champion Jose Aldo for the undisputed championship on pay per view Saturday in Rio de Janeiro, Brazil.

Max Holloway has come to Brazil to take everything Jose Aldo has built for himself as the greatest featherweight in the history of the sport. When it's over, Holloway doesn't want any excuses from the champ.

Max Holloway reacts in the Octagon after becoming the undisputed UFC featherweight champion.

UFC.com's Matt Parrino & NESN.com's Andre Khatchaturian discuss whether Jose Aldo's best days are behind him, what's next for Max Holloway and preview Derrick Lewis-Mark Hunt. Plus, they talk potential trilogy fight between Ronda Rousey and Miesha Tate.

Watch the highlights from the UFC 212 post-fight press conference, featuring featherweight champion Max Holloway.

Watch Max Holloway's Performance of the Night victory over Cub Swanson during their bout in Newark, New Jersey in April of 2015.

The greatest featherweight that's ever lived, Jose Aldo, plans to add to his legacy when he takes on Max Holloway for the undisputed featherweight championship at UFC 212 Saturday on Pay-Per-View.

Watch as the stars of UFC 212 faceoff at Media Day, featuring Jose Aldo, Max Holloway and more.

Preview the UFC 212 co-main event matchup between strawweight contenders Claudia Gadelha and Karolina Kowalkiewicz.

Watch Paulo Borrachinha in the Octagon after his win over Oluwale Bamgbose at UFC 212 in Brazil.

Claudia Gadelha talks backstage after submitting Karolina Kowalkiewicz in the first round at UFC 212.

Watch the highlights from Friday's Summer Kickoff Press Conference, featuring Daniel Cormier, Jon Jones and more.

Go behind the scenes of UFC 212 and get up close with champion Max Holloway after his featherweight title victory over Jose Aldo and more. Watch the full version now only on UFC FIGHT PASS.

Watch Vitor Belfort finish Luke Rockhold during their bout from 2013. Don't miss Belfort take on Nate Marquardt at UFC 212 on June 3.

In front of his hometown fans, Jose Aldo worked out Wednesday ahead of his featherweight title fight against Max Holloway in the main event of UFC 212. Watch highlights from open workouts featuring Aldo, Holloway, Claudia Gadelha & Karolina Kowalkiewicz.

Jose Adlo and Max Holloway meet on Saturday at UFC 212 to unify the UFC featherweight title.

Watch the final staredown between UFC featherweight champion Jose Aldo and interim champion Max Holloway from Friday's ceremonial weigh-ins in Brazil ahead of UFC 212 Saturday on Pay Per View.

Watch Claudia Gadelha in the Octagon interview after UFC 212 in Brazil.

Re-watch the UFC 212 Press Conference from Brazil on April 12, featuring Jose Aldo, Max Holloway and more.

UFC Minute host Lisa Foiles recaps UFC 212 and gives instruction on how to order the UFC 212 replay.

Watch Claudia Gadelha defeat Jessica Aguilar at UFC 190. Gadelha takes on Karolina Kowalkiewicz at UFC 212 on June 3.

Legend Vitor Belfort has done it all in mixed martial arts and he enters the Octagon for the 25th time when he takes on Nate Marquardt at UFC 212 in Rio Saturday on Pay Per View.