Mixed martial arts superstar Conor McGregor announced his retirement from the sport on Sunday.

The two-division Ultimate Fighting Championship (UFC) World Champion said his fighting days were over in a Twitter message posted on his verified account.

This is not the first time the mixed martial arts star has announced his retirement on social media.

He announced his retirement from the sport in March of 2019 but returned to the ring earlier this year to battle American fighter, Donald “Cowboy” Cerrone in Las Vegas, Nevada.

He went on to beat the Cowboy with a technical knockout after 15 months of retirement. And in 2016, he tweeted, “I have decided to retire young. Thanks for the cheese. Catch ya’s later.”

McGregor, one of the most popular fighters in MMA history, has a record of 22-4 and was the first UFC fighter to hold two championship belts at the same time.

McGregor leaves the sport ranked 8th on the Ultimate Fighting Championship (UFC) pound-for-pound list.