Clark returned to boxing in August 2018 after an eighteen-month hiatus from the sport. He won his first two fights on return, but lost his final bout for the Australasian Light Heavyweight Title against Lucas Miller on Friday.

Clark, 24, said it was time to give the sport up to ensure his good health.

"I'm finishing early just to get out before I get too hurt," Clark said.

"It's a very full on sport. To be getting punched in the head every day, you can only take so much. You're always a bit worried about getting hurt.

"I'm just concentrating on my family and my work and that sort of thing... I've got a few big things coming up to concentrate on."

After first getting involved with boxing at just nine-years-old, Clark said he did not want to stick with the sport if his passion started fading.

"I didn't want the fire dwindling in my tummy too much, to get where I start cutting corners with training and that sort of thing," he said.

"It was a shame to go out on a loss but I'm onto a new chapter of my life now and a new opportunity."

RELATED: Mitch Clark prepares for fight in front of a sell-out crowd

Clark narrowly lost his final fight on Friday on a points decision.

"I had a loss by one point so it was very tough," he said. "I knew he was a tough opponent. The referee mentioned that he felt like it was going to be a draw, so we both knew it was going to be close.

"But I know I tried my sweet best so that is alright."

Clark wanted to thank all of the people that helped him along during his boxing career.

"Thanks to all my supporters that have traveled over the years to all my fights, and everyone that has put in the work with me and helped me out," he said.

"Tony Lloyd with the gym in Horsham has always been there for me.

"Ray McIntosh in Colleraine as well who has been my trainer since I was nine-years-old... just a few years."