Conor McGregor knocked out Jose Aldo in 13 seconds to unify the UFC featherweight title at UFC 194 in Las Vegas on Dec. 12, 2015.

Credit: Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Newsday/Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Newsday/Jeffrey Basinger

Conor McGregor celebrates his 13-second knockout of Jose Aldo to win the UFC featherweight title at UFC 194 in Las Vegas on Dec. 12, 2015.

Credit: Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Jeffrey Basinger

Conor McGregor defeated Jose Aldo in 13 seconds of the first round for the featherweight title at UFC 194 in the MGM Grand Garden Arena in Las Vegas on Dec. 12, 2015.

Credit: Newsday/Jeffrey Basinger

Conor McGregor celebrates his 13-second knockout of Jose Aldo to win the UFC featherweight title at UFC 194 in Las Vegas on Dec. 12, 2015.

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