Conor McGregor vs. Fresh off a shocking upset win over Ronda Rousey at UFCHolm has all of the momentum in the world as she seeks to keep her undefeated record intact. And as Holm's seismic display in November reinforced, she has the arsenal to deal a knockout blow to seemingly any bantamweight fighter.
McGregor, who has never been far from controversy in his turbulent career, was charged in April with three counts of assault and one count of criminal mischief after police said he attacked a charter bus in New York carrying UFC fighters.
The year-old retires with a MMA record of 21 wins and four defeats. He is still technically suspended by the Nevada State Athletic Commission until April, for his part in a brawl that broke out after his bout with Nurmagomedov last October.
I now join my former partners on this venture, already in retirement. Dre, Burger King and Monster Energy drink. Cars are an important feature of McGregor's image as well, with over 10 luxury vehicles making up his fleet.
It's not the first time McGregor has made an announcement like this on Twitter. After defeat to Nate Diaz in he said he had decided to "retire young," but returned to fight and beat the same opponent later that same year.
Even if his MMA career is over, there is also speculation he could still take up another combat sport. Options include a possible return to the boxing ring or even a crack at bare-knuckle boxing.