Mahmoud Charr marked his return to the ring by knocking out 306 pounds of Christopher Lovejoy in Cologne.
The former WBA regular heavyweight champion ended a 42-month exile from the sport on Saturday although it lasted just over four minutes, and in the process, became Charr's quickest win since 2013.
Charr inflicted the first defeat of Lovejoy's 20-fight career and the second-round stoppage will now see the Syrian-born German fighter in line to face Trevor Bryan, who called out Mike Tyson, for the WBA secondary strap.
The ending to the fight took a turn for the worse as Charr attempted to do a cartwheel.
Lovejoy, who took a heavy beating, could be facing a legal battle if Hall of Fame promoter Don King has his way.
The American claims to have a promoting deal with Lovejoy and said Errol Ceylan "is illegally promoting a fight" under DKP.
"Lovejoy and the German promoter are defying the law," said King. "We have served them and justice will prevail.
"We will see who will be quacking when we get to court and the legal process decides that everything is there in black and white.
"Lovejoy is out there popping off and feels that this fight is for the WBA championship.
"The WBA hasn't sanctioned this illegal bout and they certainly won't do so. Trevor Bryan is the WBA champion.
"What fighter shows up in Germany without a trainer or cut man and is totally out of shape, weighing 306 pounds.
"Lovejoy lacks plain common sense. See you in court along with your German promoter. We'll see who will be laughing last on Instagram."