Scenes from UFC 194 fight week in Las Vegas.

Credit: AP/ John Locher

Urijah Faber, left, and Frankie Saenz pose during the weigh-in for UFC 194 Friday, Dec. 11, 2015, in Las Vegas. The two are scheduled to fight in a bantamweight bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: AP/John Locher

Chris Weidman poses on the scale during the weigh-in for UFC 194, Friday, Dec. 11, 2015, in Las Vegas. Weidman is scheduled to fight Luke Rockhold in a middleweight championship bout Saturday in Las Vegas.

Credit: AP/ John Locher

Chris Weidman, left, and Luke Rockhold pose during the weigh-in for UFC 194, Friday, Dec. 11, 2015, in Las Vegas. The two are scheduled to fight in a middleweight championship bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: AP/ John Locher

Conor McGregor walks on to the stage during the weigh-in for UFC 194 Friday, Dec. 11, 2015, in Las Vegas. McGregor is scheduled to fight Jose Aldo in a featherweight championship bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: AP/ John Locher

Urijah Faber poses on the scale during the weigh-in for UFC 194, Friday, Dec. 11, 2015, in Las Vegas. Faber is scheduled to fight Frankie Saenz in a bantamweight bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: AP/ John Locher

Jose Aldo poses on the scale during the weigh-in for UFC 194, Friday, Dec. 11, 2015, in Las Vegas. Aldo is scheduled to fight Conor McGregor in a featherweight championship bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: AP/ John Locher

Frankie Saenz poses on the scale during the weigh-in for UFC 194, Friday, Dec. 11, 2015, in Las Vegas. Saenz is scheduled to fight Urijah Faber in a bantamweight bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: AP/ John Locher

Conor McGregor poses on the scale during the weigh-in for UFC 194, Friday, Dec. 11, 2015, in Las Vegas. McGregor is scheduled to fight Jose Aldo in a featherweight championship bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: AP/ John Locher

Luke Rockhold poses on the scale during the weigh-in for UFC 194, Friday, Dec. 11, 2015, in Las Vegas. Rockhold is scheduled to fight Chris Weidman in a middleweight championship bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: AP/ John Locher

UFC president Dana White, center, stands between Conor McGregor, right, and Jose Aldo during the weigh-in for UFC 194, Friday, Dec. 11, 2015, in Las Vegas. McGregor and Aldo are scheduled to fight in a featherweight championship bout Saturday in Las Vegas. (AP Photo/John Locher)

Credit: Jeffrey Basinger

UFC middleweight champion Chris Weidman takes down his trainer Ray Longo Dec. 10, 2015 during an open workout two days ahead of UFC 194 where Weidman will face Luke Rockhold for the title.

Credit: Jeffrey Basinger

UFC interim featherweight champion Conor McGregor shows off his skills with movement coach Ido Portal in an open workout at the MGM Grand in Las Vegas on Dec. 10, 2015.

Credit: Jeffrey Basinger

UFC interim featherweight champion Conor McGregor shows off his skills with movement coach Ido Portal in an open workout at the MGM Grand in Las Vegas on Dec. 10, 2015.

Credit: Jeffrey Basinger

UFC featherweight champion Jose Aldo warms up at an open work out at the MGM Grand in Las Vegas on Dec. 10, 2015, two days ahead of his fight against Conor McGregor.

Credit: Jeffrey Basinger

UFC interim featherweight champion Conor McGregor participates in an open workout at the MGM Grand in Las Vegas on Dec. 10, 2015.

Credit: Jeffrey Basinger

UFC middleweight champion Chris Weidman takes questions from media after an open workout at the MGM Grand in Las Vegas on Dec. 10, 2015, two days ahead of his fight against Luke Rockhold.

Credit: Jeffrey Basinger

Luke Rockhold answers questions from media at an open workout at the MGM Grand in Las Vegas on Dec. 10, 2015. He fights Chris Weidman at UFC 194 on Saturday.

Credit: AP/ L.E. Baskow

UFC featherweight fighter Frankie Edgar listens to a question during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC Middleweight champion Chris Weidman, left, smiles at his opponent Luke Rockhold during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC middleweight champion Chris Weidman smiles during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC featherweight champion Jose Aldo smiles during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC featherweight champion Jose Aldo, left, poses for a photo with his opponent interim UFC featherweight champion Conor McGregor, right, during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC President Dana White during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC President Dana White, center presides over a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

Interim UFC featherweight champion Conor McGregor speaks during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC middleweight fighter Luke Rockhold answers a question during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC featherweight champion Jose Aldo, left, stands with his opponent interim UFC featherweight champion Conor McGregor, right, during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC featherweight fighter Frankie Edgar, left, and opponent Chad Mendes stand together during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: AP/ L.E. Baskow

UFC featherweight fighter Chad Mendes listens during a UFC 194 news conference at the MGM Grand Garden Arena in Las Vegas, Wednesday, Dec. 9, 2015. (L.E. Baskow/Las Vegas Sun via AP) LAS VEGAS REVIEW-JOURNAL OUT; MANDATORY CREDIT

Credit: Newsday / Mark La Monica

UFC middleweight champion Chris Weidman of Baldwin shares a laugh with his team during UFC 194 fight week on Tuesday, Dec. 8, 2015, in Las Vegas. Weidman fights Luke Rockhold on Saturday.

Credit: Newsday / Mark La Monica

Ray Longo, trainer of UFC middleweight champion Chris Weidman, looks on before the start of a workout during UFC 194 fight week on Tuesday, Dec. 8, 2015, in Las Vegas.

Credit: Mark La Monica

UFC middleweight champion Chris Weidman of Baldwin shares a laugh with his team during UFC 194 fight week on Tuesday, Dec. 8, 2015, in Las Vegas. Weidman fights Luke Rockhold on Saturday.

Credit: Mark La Monica

UFC middleweight champion Chris Weidman of Baldwin talks with his Brazilian Jiu-Jitsu coach Matt Serra during UFC 194 fight week on Tuesday, Dec. 8, 2015, in Las Vegas. Weidman fights Luke Rockhold on Saturday.

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