Former interim UFC heavyweight champion Shane Carwin has again announced his retirement from MMA.

Carwin (12-2) won his first 12 pro fights before suffering back-to-back losses to Brock Lesnar and Junior dos Santos. He retired the first time due to injuries, but believed to be healthy enough to fight once more.

Below is the statement Carwin posted on Reddit:

We have tried to get fights it seems like there are no interesting fights and I am not getting younger. Let me just lay my gloves down right here on r/MMA.

Thank you to each and every one of you. It is odd to be healthy and unable to compete yet able to compete when so unhealthy. I guess we end with never knowing what could have been.

Somber would be the best way to describe the emotion. Thank you all for the love, the insults and the great times. I will sink back into the mode of being a redditor and my quest to become a mod here. I am also on the hunt for a large Fedora I am like an 8 and 1/2 in hats. <--Mod requirements. Seriously thank you all from the bottom of my heart for being amazing and making this sport amazing. We feel the love and energy in the cage and it completes the journey. We love what we do because we get to do it for you. -Carwin huge shout out to u/ingrainedJordan for going to bat for me, for taking the bad with the good and rarely getting credit. You and Jason do work.