Sad to see him retire, thought he was a great fighter and some of his fights were really entertaining. He's been unfortunate with a lot of injuries. Came so close to winning the title in that fight against Brock Lesnar, can't believe Brock survived in that fight and I thought Shane had won it for sure.
http://www.mmajunkie.com/news/2013/05/former-ufc-interim-champ-shane-carwin-announces-retirement-from-mma