UK Anti-Doping banned Moises Calleros for four years on Monday only to learn the Mexican boxer had passed away in March.
Calleros tested positive for cocaine and its metabolite benzoylecgonine after his stoppage defeat by Olympic champion Galal Yafai in April 2023.
Ukad released a statement announcing Calleros’ suspension but quickly removed the post after learning the fighter had died.
“Ukad received this information shortly after publishing details of the outcome from a case,” the anti-doping body said.
“Unfortunately, Ukad had no information regarding Mr Calleros’ sad passing at the time of publication and has now removed all details of this case from its channels.”
Calleros, who died aged 34, left behind an impressive fight record of 37 wins, 11 losses and one draw.
He made his professional debut in 2008, fighting at minimumweight and flyweight.
Calleros was unsuccessful in his one world title challenge in 2018 and was one fight away from competing in 50 professional bouts.