McCann is one of the rising stars of UFC, and Saturday marked another major moment in the career of the flyweight fighter.
Meanwhile, Pimblett won again four months after UFC’s last visit to London, submitting Jordan Leavitt in the second round.
He also called for men to discuss their feeling in an emotional speech after the fight following the death of a friend by suicide.
"There's a stigma in this world that men can't talk - listen, if you're a man, and you've got weight on your shoulders ... please speak to someone, speak to anyone. Please, let's get rid of this stigma, and men – start talking,
Despite wins for McCann and Pimblett, there was no success for fellow Briton Tom Aspinall who suffered a knee injury just seconds into the main event.
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