Deontay Wilder's younger brother Marsellos was knocked out in brutal fashion on the undercard in Las Vegas last November.
The 30-year-old cruiserweight was dropped by Dustin Long in the fourth round and the referee immediately waved the fight off.
Marsellos, four years younger than brother Deontay, suffered his second defeat in seven professional bouts.
He only began his professional career in May 2018 and it has not gone to plan for the 30-year-old so far.
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The knockout was another setback for his hopes of making a mark on boxing like his brother.
In round four of the six-round contest, Long stepped in and landed a vicious left hand right on Wilder's chin.
He fell to the canvas immediately and wasn't even given a chance by the referee to recover with the fight being stopped straight away.
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Referee Jay Nady called the contest off 1:51 into the fourth round to give 37-year-old Long a third win in six fights.
The bout was early on the undercard of Deontay Wilder's stunning win over Luis Ortiz in Las Vegas.
Words by Sunni Upal.
Topics: Boxing News, Boxing, Deontay Wilder
