Mitch Clarke announced his retirement from MMA Saturday night following a loss at UFC 215.

Clarke also expressed his feelings on Twitter in the hours after his decision.

“I’m sorry to all my fans, wasn’t the result I wanted but I wanted to go out on my shield,” he said. “It hurts my heart to leave but this is where my heart is headed and you can’t half-ass this sport. I did more than was expected of me and wish I could give more.

“To the people who feel it’s necessary to tell me I suck right after my fight, you know nothing of sacrifice to follow your dreams.”