Kauffman landed a perfect right hook from the southpaw stance that sent Carmack down at 2:07.
The bout took place on a card that was headlined by a fight between former world champions Antonio Tarver and Steve Cunningham that ended in a draw.
“I didn’t think Carmack would hit as hard as he did. I went out there with the mindset of going some rounds to work off ring rust. As soon as he hit me with a right hand, I knew that he was strong and wanted to get him out quick. The gameplan that we worked on was to go to the body and once I dropped him, I knew he was done,” said Kauffman.
Kauffman is due back on September 18 at the Claridge in Atlantic City.
“I wasted no time and am already back in the gym with Naazim Richardson and my dad and I am ready to move forward with bigger fights. I expect this fight to be another tune up and then I will be ready for a much bigger fight.”