Conor McGregor says he’s retiring from fighting….

The biggest star in UFC history says he’s done in the Octagon.

Conor Mcgregor tweeted Saturday night that he will be retiring from MMA. It was a sudden, unexpected announcement — and one that many thought was insincere. McGregor has tweeted twice before that he was hanging up the gloves, but fought as recently as this past January beating Cowboy.

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