Former UFC interim heavyweight champion Shane Carwin (pictured) unceremoniously announced his retirement via Twitter Tuesday evening.
“Officially retired 2day:-) thank you to my family, friends and fans! #dreambig GOD BLESS!!!” Carwin tweeted.
Injuries likely lead the 38-year-old to his decision to hang up his mixed martial arts gloves. Carwin underwent a “foraminotomy” in November of 2010 to enlarge the passageway where the spinal nerve root exits the spinal canal. Surgeons removed bone and/or tissue that obstructed the passageway and pinched the spinal nerve root, which often caused severe inflammation and pain.
Carwin thought he was in the clear until an October 2011 MRI revealed a disc in his lower back had penetrated into the nerves. His doctor gave him two options; retire and postpone surgery for a few years or undergo the operation to resume his career.
The charismatic slugger opted to go under the knife again, but hasn’t been seen since.
Carwin blasted out of the MMA gates by winning his first 12 professional bouts in the opening round. He lost his last two fights, with his most recent coming in a unanimous decision defeat to Junior dos Santos in a top contender contest at UFC 131 in June 2011.
The highlight of Carwin’s career came at UFC 111 when he knocked out Frank Mir to capture the interim heavyweight crown.
Despite all of his accomplishments inside the Octagon, Carwin continued to maintain his job as an engineer outside the cage.