Former Ultimate Fighting Championship (UFC) title contender Chael Sonnen has announced that he is retiring from mixed martial arts (MMA), two days after it was revealed that he failed a random drug test.
"I want to take an opportunity to officially announce my retirement from competitive mixed martial arts," Sonnen said on Fox Sports 1's UFC Tonight show, as quoted by the UFC website.
It was revealed earlier this week that Sonnen had failed a random drug test for anastrozole and clomiphene, and was subsequently removed from the UFC 175 fight card where he was supposed to face off against Vitor Belfort.
Sonnen retires with a record of 28-14-1. He fought for the world title three times, losing to Anderson Silva twice and to Jon Jones as well.
The controversial fighter took the time to thank Silva, whom he lost to in 2010 and 2012, for helping make him one of the most popular men in the sport.
"I couldn't have got to where I am without this dance partner, and it’s of course you, Anderson Silva," said Sonnen.
"Thank you for the opportunity, thank you for the memories, thank you for the invitation to the barbecue, even though I didn’t take you up on it," he added.
Sonne’s last fight was a loss to Rashad Evans at UFC 167.