Conor McGregor Talks Return to UFC, Origin of His "Notorious" Nickname | The Tonight Show

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Conor McGregor talks about his big return to the UFC, the time he knocked someone out in 13 seconds and the origin of his nickname "The Notorious." The Tonight Show Starring Jimmy Fallon. Stream now on Peacock: https://bit.ly/3gZJaNy Subscribe NOW to The Tonight Show Starring Jimmy Fallon: http://bit.ly/1nwT1aN Watch The Tonight Show Starring Jimmy Fallon Weeknights 11:35ET/10:35c Get more The Tonight Show Starring Jimmy Fallon: https://www.nbc.com/the-tonight-show JIMMY FALLON ON SOCIAL