UFC 194 Photos The Las Vegas crowd prepares for the UFC 194 main event.

UFC 194 Photos Conor McGregor flexes in the staging area at UFC 194.

UFC 194 Photos Conor McGregor addresses the Las Vegas crowd before entering the Octagon.

UFC 194 Photos Conor McGregor warms up inside the cage before facing Jose Aldo at UFC 194.

UFC 194 Photos Jose Aldo trots to the Octagon to meet Jose Aldo at UFC 194.

UFC 194 Photos Bruce Buffer announces Conor McGregor at UFC 194.

UFC 194 Photos Jose Aldo awaits the opening bell.

UFC 194 Photos Conor McGregor flicks a left hand toward Jose Aldo at UFC 194.

UFC 194 Photos Conor McGregor lands a left hand that knocks down Jose Aldo at UFC 194.

UFC 194 Photos Jose Aldo and Conor McGregor meet in the center of the Octagon to trade punches.

UFC 194 Photos Conor McGregor swarms after knocking down Jose Aldo with a punch at UFC 194.

UFC 194 Photos Conor McGregor lands a hammerfist to a downed Jose Aldo at UFC 194.

UFC 194 Photos Jose Aldo lies unconscious on the canvas at UFC 194.

UFC 194 Photos Referee John McCarthy tends to Jose Aldo at UFC 194.

UFC 194 Photos Conor McGregor sits atop the UFC Octagon after winning the UFC featherweight title at UFC 194.

UFC 194 Photos Conor McGregor parades around the UFC Octagon sporting the Irish flag at UFC 194.

UFC 194 Photos UFC President Dana White straps the title around the waist of Conor McGregor at UFC 194.

UFC 194 Photos A beaming Conor Mcgregor soaks in the applause after winning the UFC featherweight championship at UFC 194.

UFC 194 Photos Jose Aldo regroups inside the cage after losing to Conor McGregor at UFC 194.

UFC 194 Photos Jose Aldo covers his head after losing the featherweight title to Conor McGrgor at UFC 194.

UFC 194 Photos Conor McGregor shows off his new hardware at UFC 194.

UFC 194 Photos Conor McGregor strikes a pose after winning the UFC featherweight title from Jose Aldo at UFC 194.

UFC 194 Photos Conor McGregor presents his freshly earned UFC featherweight title to the Las Vegas crowd.

UFC 194 Photos Chris Weidman walks to the UFC Octagon to meet Luke Rockhold.

UFC 194 Photos Luke Rockhold begins his fight against Chris Weidman at UFC 194.

UFC 194 Photos Chris Weidman basks in the spotlight before his UFC 194 main-event tilt.

UFC 194 Photos Chris Weidman attempts to take down Luke Rockhold at UFC 194.

UFC 194 Photos Chris Weidman escapes a guillotine attempt from Luke Rockhold at UFC 194.

UFC 194 Photos Luke Rockhold kicks Chris Weidman at UFC 194.

UFC 194 Photos Yoel Romero salutes before entering the cage.

UFC 194 Photos Ronaldo Souza attempt to elbow Yoel Romero at UFC 194.

UFC 194 Photos Ronaldo Souza looks for the body shot against Yoel Romero at UFC 194.

UFC 194 Photos Yoel Romero works from inside Ronaldo Souza's guard at UFC 194.

UFC 194 Photos Yoel Romero batters Ronaldo Souza with blow from the top at UFC 194.

UFC 194 Photos Ronaldo Souza takes a knee inside the cage.

UFC 194 Photos Yoel Romero escapes a takedown attempt.

UFC 194 Photos Ronaldo Souza works for a takedown along the cage.

UFC 194 Photos Ronaldo Souza and Yoel Romero trade hands inside the Octagon.

UFC 194 Photos Ronaldo 'Jacare' Souza works some ground-and-pound on Yoel Romero at UFC 194.

UFC 194 Photos Yoel Romero raises his hand inside the Octagon at UFC 194.

UFC 194 Photos Yoel Romero is announced the winner over Ronaldo 'Jacare' Souza at UFC 194.

UFC 194 Photos Yoel Romero celebrates victory.

UFC 194 Photos Demian Maia awaits the opening bell for his bout vs. Gunnar Nelson.

UFC 194 Photos Demian Maia looks to maintain top position against Gunnar Nelson.

UFC 194 Photos Demian Maia and Gunnar Nelson engage on the ground at UFC 194.

UFC 194 Photos Jeremy Stephens paces inside the cage.

UFC 194 Photos Max Holloway stares across the cage at Jeremy Stephens at UFC 194.

UFC 194 Photos Max Holloway and Jeremy Stephens trade blows at UFC 194.

UFC 194 Photos Jeremy Stephens lands a high kick.

UFC 194 Photos Max Holloway searches for the choke against Jeremy Stephens at UFC 194.

UFC 194 Photos Max Holloway scores with ground-and-pound at UFC 194.

UFC 194 Photos Max Holloway and Jeremy Stephens await the decision at UFC 194.

UFC 194 Photos Max Holloway celebrates before his post-fight interview at UFC 194.

UFC 194 Photos Frankie Saenz showcases his athleticism with a jumping knee at UFC 194.

UFC 194 Photos Urijah Faber knees Frankie Saenz at UFC 194.

UFC 194 Photos Urijah Faber looks to finish Frankie Saenz with elbows at UFC 194.

UFC 194 Photos Urijah Faber scores with an elbow.

UFC 194 Photos Frankie Saenz lands a right against Urijah Faber.

UFC 194 Photos Frankie Saenz scores with a knee at UFC 194.

UFC 194 Photos Urijah Faber and Frankie Saenz close out their three-round affair at UFC 194.

UFC 194 Photos Urijah Faber takes home the decision victory at UFC 194.

UFC 194 Photos Tecia Torres focuses in-cage prior to her bout against Jocelyn Jones-Lybarger at UFC 194.

UFC 194 Photos Jocelyn Jones-Lybarger eats a punch from Tecia Torres.

UFC 194 Photos Tecia Torres and Jocelyn Jones-Lybarger trade punches at UFC 194.

UFC 194 Photos Tecia Torres lands an elbow from top position.

UFC 194 Photos Tecia Torres lands a left on Jocelyn Jones-Lybarger.

UFC 194 Photos Tecia Torres swarms with punches.

UFC 194 Photos Jocelyn Jones-Lybarger scores with a left against Tecia Torres at UFC 194.

UFC 194 Photos Tecia Torres is announced the winner at UFC 194.

UFC 194 Photos Warlley Alves eyes up his opponent at UFC 194.

UFC 194 Photos Warlley Alves locks in a guillotine choke against Colby Covington.

UFC 194 Photos Warlley Alves finishes the guillotine choke in Round 1 against Colby Covington at UFC 194.

UFC 194 Photos Warlley Alves rides high in victory.

UFC 194 Photos Warlley Alves celebrates his victory over Colby Covington.

UFC 194 Photos Kevin Lee and Leonardo Santos exchange blows at UFC 194.

UFC 194 Photos Leonardo Santos lands a shot at UFC 194.

UFC 194 Photos Leonardo Santos scores a takedown on Kevin Lee at UFC 194.

UFC 194 Photos Leonardo Santos swarms for the finish.

UFC 194 Photos Kevin Lee exits the cage after losing to Leonardo Santos at UFC 194.

UFC 194 Photos Leonardo Santos raises the Brazilian flag in celebration of his victory at UFC 194.

UFC 194 Photos Leonardo Santos celebrates his first-round victory over Kevin Lee at UFC 194.

UFC 194 photos Magomed Mustafaev drills Joe Proctor during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Magomed Mustafaev finishes off Joe Proctor during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Magomed Mustafaev celebrates during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Magomed Mustafaev during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Magomed Mustafaev is declared the winner during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos John Makdessi lands a jab during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Yancy Medeiros lands a punch during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Yancy Medeiros lands a hook over the top during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos A punch misses Yancy Medeiros during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos John Makdessi eats a left hand during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Yancy Medeiros lands a knee during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Yancy Medeiros is declared the winner during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Court McGee and Mauricio Alexandre tangle during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Court McGee eats a punch during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.

UFC 194 photos Mauricio Alexandre fires a left hand during UFC 194 at the MGM Grand Garden Arena in Las Vegas, NV., on Sat., Dec. 12, 2015.