The southpaw suffered a second straight loss on the back of his reverse to Jessie Vargas in November and has now decided enough is enough.
“I want to apologize to all who had confidence in me and to my family. I feel at peace and at the same time disappointed with myself,” DeMarco said in a statement. “I thank God and boxing and the people who always supported me for all they gave me during my career. It’s tough, but I know God will show me new goals and dreams to conquer.
“I will miss the ring and all the people, but will always have them in my heart. God bless you today and always, and all my fights were for you, my family and people that helped me in my beginnings.
“Thanks to God for allowing me to fulfill my dream. I will miss the ring and all the people, but will always have them in my heart,” he added.
DeMarco held the WBC title at 135lbs when defeating Jorge Linares in October 2010, but lost the green belt to Adrien Broner one year later.
