Shane Carwin announced his retirement from mixed martial arts on Tuesday evening. The former interim UFC heavyweight champion did so via Twitter, saying "Officially retired 2day:-) thank you to my family, friends and fans! #dreambig GOD BLESS!!!"
Carwin leaves the sport with a record of 12-2, with those two losses coming in the final two fights of his career.
Carwin fought for the UFC six times. The fighter, known as "The Engineer" due to his day job as an engineer for the North Weld County Water District in Colorado, went 4-2 during an injury-plagued run with the promotion.
Carwin's last fight was a bloody and bruising loss to Junior dos Santos in June 2011.
Here's a look at Carwin's run in the UFC.